H2H data updated: 2026-09-14 00:00 UTC
Agnieszka Radwanska holds a 1–0 lead over Kai-Chen Chang in their WTA head-to-head. Across 1 main-draw meeting, Agnieszka Radwanska leads 1–0 on hard courts. Most recently, Agnieszka Radwanska won the 2011 Stanford round of 16 6-4 3-6 6-0.
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| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Agnieszka Radwanska | 6-4 3-6 6-0 | Kai-Chen Chang | Match data | Jul 29, 2011* | R16 | Stanford | Premier → modern equivalent WTA 500 | Hard |
Estimated match date where the exact historical date is unavailable. Arrows show an edition's recorded category and documented modern equivalent; unresolved editions keep their recorded category. Asterisked totals include editions mapped from documented historical predecessor categories. Mapping details.
| Player | Current | Peak | Pts | Elo | W | L | Win % | GS | 1000 including documented historical predecessor categories | Finals | 500 including documented historical predecessor categories | 250 including documented historical predecessor categories | Titles |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Agnieszka Radwanska | #74 | #2 | 8,530 | 2,103 | 513 | 241 | 68.0% | 0 | 5 | 1 | 7 | 7 | 20 |
| Kai-Chen Chang | #1,233 | #82 | 808 | 1,646 | 32 | 59 | 35.2% | 0 | 0 | 0 | 0 | 0 | 0 |
Seasons are aligned by the age each player spent most of that calendar year. GS and Titles are cumulative career totals through that season.
| Age | Agnieszka Radwanska | Kai-Chen Chang | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 17 | 2006 | 11–8 | 57.9% | #61 | 1,672 | 0 | 0 | — | — | — | — | — | — | — |
| 18 | 2007 | 27–19 | 58.7% | #26 | 1,809 | 0 | 1 | 2009 | 5–5 | 50.0% | #94 | 1,558 | 0 | 0 |
| 19 | 2008 | 52–20 | 72.2% | #10 | 1,914 | 0 | 4 | 2010 | 9–15 | 37.5% | #117 | 1,565 | 0 | 0 |
| 20 | 2009 | 44–23 | 65.7% | #10 | 1,912 | 0 | 4 | 2011 | 1–8 | 11.1% | #148 | 1,488 | 0 | 0 |
| 21 | 2010 | 32–18 | 64.0% | #14 | 1,862 | 0 | 4 | 2012 | 9–11 | 45.0% | #86 | 1,579 | 0 | 0 |
| 22 | 2011 | 46–18 | 71.9% | #8 | 1,980 | 0 | 7 | 2013 | 1–4 | 20.0% | #621 | 1,531 | 0 | 0 |
| 23 | 2012 | 59–20 | 74.7% | #4 | 1,988 | 0 | 10 | — | — | — | — | — | — | — |
| 24 | 2013 | 56–20 | 73.7% | #5 | 1,966 | 0 | 13 | 2015 | 1–2 | 33.3% | #134 | 1,529 | 0 | 0 |
| 25 | 2014 | 43–22 | 66.2% | #6 | 1,877 | 0 | 14 | 2016 | 3–4 | 42.9% | #131 | 1,602 | 0 | 0 |
| 26 | 2015 | 50–22 | 69.4% | #5 | 1,961 | 0 | 17 | 2017 | 2–9 | 18.2% | #219 | 1,536 | 0 | 0 |
| 27 | 2016 | 53–19 | 73.6% | #3 | 1,980 | 0 | 20 | 2018 | 1–1 | 50.0% | #401 | 1,536 | 0 | 0 |
| 28 | 2017 | 25–18 | 58.1% | #28 | 1,823 | 0 | 20 | — | — | — | — | — | — | — |
| 29 | 2018 | 15–14 | 51.7% | #74 | 1,752 | 0 | 20 | — | — | — | — | — | — | — |
Seasons are aligned by the age each player spent most of that calendar year. Results cover completed main-draw matches. Bold green marks the higher win percentage when both players have at least 5 matches on that surface at the aligned age.
| Age | Agnieszka Radwanska | Kai-Chen Chang | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Hard | Clay | Grass | Carpet | Yr | Hard | Clay | Grass | Carpet | |||||||||||||||||||||||||
| W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | |||
| 17 | 2006 | 6 | 4 | 10 | 60.0% | 2 | 3 | 5 | 40.0% | 3 | 1 | 4 | 75.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 18 | 2007 | 18 | 10 | 28 | 64.3% | 5 | 5 | 10 | 50.0% | 4 | 3 | 7 | 57.1% | 0 | 1 | 1 | 0.0% | 2009 | 5 | 5 | 10 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — |
| 19 | 2008 | 30 | 14 | 44 | 68.2% | 14 | 5 | 19 | 73.7% | 8 | 1 | 9 | 88.9% | — | — | — | — | 2010 | 7 | 9 | 16 | 43.8% | 1 | 4 | 5 | 20.0% | 1 | 2 | 3 | 33.3% | — | — | — | — |
| 20 | 2009 | 28 | 16 | 44 | 63.6% | 8 | 4 | 12 | 66.7% | 6 | 2 | 8 | 75.0% | 2 | 1 | 3 | 66.7% | 2011 | 1 | 5 | 6 | 16.7% | 0 | 1 | 1 | 0.0% | 0 | 2 | 2 | 0.0% | — | — | — | — |
| 21 | 2010 | 25 | 12 | 37 | 67.6% | 4 | 4 | 8 | 50.0% | 3 | 2 | 5 | 60.0% | — | — | — | — | 2012 | 9 | 8 | 17 | 52.9% | 0 | 1 | 1 | 0.0% | 0 | 2 | 2 | 0.0% | — | — | — | — |
| 22 | 2011 | 36 | 12 | 48 | 75.0% | 7 | 4 | 11 | 63.6% | 3 | 2 | 5 | 60.0% | — | — | — | — | 2013 | 1 | 4 | 5 | 20.0% | — | — | — | — | — | — | — | — | — | — | — | — |
| 23 | 2012 | 41 | 13 | 54 | 75.9% | 12 | 4 | 16 | 75.0% | 6 | 3 | 9 | 66.7% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 24 | 2013 | 46 | 15 | 61 | 75.4% | 5 | 3 | 8 | 62.5% | 5 | 2 | 7 | 71.4% | — | — | — | — | 2015 | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — | — | — | — | — |
| 25 | 2014 | 31 | 16 | 47 | 66.0% | 9 | 4 | 13 | 69.2% | 3 | 2 | 5 | 60.0% | — | — | — | — | 2016 | 3 | 4 | 7 | 42.9% | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 2015 | 36 | 16 | 52 | 69.2% | 2 | 3 | 5 | 40.0% | 12 | 3 | 15 | 80.0% | — | — | — | — | 2017 | 2 | 7 | 9 | 22.2% | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 27 | 2016 | 43 | 13 | 56 | 76.8% | 5 | 3 | 8 | 62.5% | 5 | 3 | 8 | 62.5% | — | — | — | — | 2018 | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — |
| 28 | 2017 | 20 | 14 | 34 | 58.8% | 2 | 2 | 4 | 50.0% | 3 | 2 | 5 | 60.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 29 | 2018 | 10 | 11 | 21 | 47.6% | 0 | 1 | 1 | 0.0% | 5 | 2 | 7 | 71.4% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 370 | 166 | 536 | 69.0% | 75 | 45 | 120 | 62.5% | 66 | 28 | 94 | 70.2% | 2 | 2 | 4 | 50.0% | — | 30 | 45 | 75 | 40.0% | 1 | 7 | 8 | 12.5% | 1 | 7 | 8 | 12.5% | — | — | — | — |
Seasons are aligned by the age each player spent most of that calendar year. Detailed serve and return statistics available for 651/755 of Agnieszka Radwanska's and 84/91 of Kai-Chen Chang's main draw matches. Sample is shown as matches with detailed serve and return statistics / total main draw matches. Bold green marks the stronger value when both stat samples contain at least 5 matches; lower is better for DFs/M.
| Age | Agnieszka Radwanska | Kai-Chen Chang | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Sample | Aces/M | DFs/M | 1st Sv% | 1st Pts% | 2nd Pts% | BP Saved% | BP Conv% | Svc Pts% | Ret Pts% | Yr | Sample | Aces/M | DFs/M | 1st Sv% | 1st Pts% | 2nd Pts% | BP Saved% | BP Conv% | Svc Pts% | Ret Pts% | |
| 17 | 2006 | 10/19 | 1.8 | 1.6 | 65.4% | 59.8% | 46.5% | 60.6% | 47.1% | 55.1% | 46.0% | — | —/— | — | — | — | — | — | — | — | — | — |
| 18 | 2007 | 41/46 | 2.0 | 1.8 | 60.6% | 62.9% | 47.7% | 57.5% | 43.5% | 57.3% | 44.3% | 2009 | 9/10 | 1.0 | 4.1 | 64.7% | 59.0% | 43.6% | 58.2% | 54.3% | 53.4% | 47.7% |
| 19 | 2008 | 59/72 | 1.4 | 1.4 | 67.0% | 63.2% | 46.8% | 50.4% | 54.4% | 57.9% | 49.2% | 2010 | 22/24 | 1.6 | 6.8 | 58.9% | 58.6% | 41.8% | 54.0% | 46.2% | 51.7% | 44.6% |
| 20 | 2009 | 64/67 | 1.5 | 1.5 | 66.3% | 62.9% | 48.9% | 52.1% | 56.0% | 58.2% | 48.9% | 2011 | 9/9 | 1.7 | 4.6 | 63.3% | 61.6% | 39.8% | 49.4% | 42.5% | 53.4% | 40.5% |
| 21 | 2010 | 49/50 | 1.6 | 1.2 | 65.6% | 64.1% | 50.5% | 51.5% | 47.9% | 59.2% | 48.8% | 2012 | 18/20 | 1.8 | 5.3 | 59.7% | 62.2% | 41.6% | 43.4% | 47.6% | 54.1% | 43.1% |
| 22 | 2011 | 56/64 | 2.3 | 1.2 | 67.1% | 64.4% | 51.4% | 58.4% | 54.0% | 59.9% | 49.6% | 2013 | 4/5 | 0.5 | 7.3 | 58.3% | 63.2% | 38.3% | 61.1% | 54.1% | 52.8% | 44.6% |
| 23 | 2012 | 68/79 | 2.4 | 1.2 | 67.3% | 66.3% | 46.7% | 56.9% | 56.1% | 59.9% | 49.0% | — | —/— | — | — | — | — | — | — | — | — | — |
| 24 | 2013 | 69/76 | 2.4 | 1.6 | 64.9% | 65.6% | 50.7% | 55.0% | 53.1% | 60.4% | 48.1% | 2015 | 2/3 | 2.0 | 3.0 | 62.9% | 55.7% | 48.8% | 62.9% | 52.6% | 53.0% | 47.3% |
| 25 | 2014 | 60/65 | 2.4 | 1.3 | 65.5% | 63.3% | 48.2% | 56.8% | 52.0% | 58.2% | 49.8% | 2016 | 7/7 | 1.6 | 7.1 | 57.2% | 62.9% | 41.9% | 56.2% | 48.6% | 54.3% | 47.2% |
| 26 | 2015 | 49/72 | 2.5 | 1.3 | 66.7% | 68.4% | 51.3% | 56.8% | 54.6% | 62.7% | 46.7% | 2017 | 11/11 | 2.0 | 7.5 | 57.6% | 55.9% | 34.9% | 51.1% | 38.8% | 46.9% | 39.9% |
| 27 | 2016 | 60/73 | 2.8 | 1.8 | 62.4% | 67.3% | 47.7% | 60.1% | 57.3% | 60.0% | 49.8% | 2018 | 2/2 | 1.0 | 5.5 | 63.9% | 60.4% | 38.2% | 56.7% | 60.0% | 52.2% | 50.9% |
| 28 | 2017 | 42/43 | 2.0 | 1.6 | 61.8% | 64.9% | 45.8% | 53.6% | 46.7% | 57.5% | 46.3% | — | —/— | — | — | — | — | — | — | — | — | — |
| 29 | 2018 | 24/29 | 1.4 | 1.9 | 60.8% | 59.8% | 44.2% | 45.6% | 42.6% | 53.4% | 43.2% | — | —/— | — | — | — | — | — | — | — | — | — |
| Career | — | 651/755 | 2.1 | 1.5 | 65.1% | 64.6% | 48.5% | 55.1% | 52.4% | 59.0% | 48.2% | — | 84/91 | 1.6 | 6.0 | 60.0% | 59.9% | 40.8% | 52.1% | 47.1% | 52.3% | 44.0% |
Seasons are aligned by the age each player spent most of that calendar year. Metrics use eligible main-draw results; point statistics use matches with detailed data. Bold green marks the stronger value when both underlying samples are sufficient. Lower is better for Schedule because a negative value means a tougher schedule. Career Schedule is normalized per 100 matches.
| Age | Agnieszka Radwanska | Kai-Chen Chang | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Elo | P+ | Serve+ | Return+ | PD | TPW% | Hard Elo | Clay Elo | Grass Elo | Set Win % | Set Margin | Dec. Set | Tiebreak | Pressure+ | Schedule | Yr | Elo | P+ | Serve+ | Return+ | PD | TPW% | Hard Elo | Clay Elo | Grass Elo | Set Win % | Set Margin | Dec. Set | Tiebreak | Pressure+ | Schedule | |
| 17 | 2006 | 1673 | 141.6 | +0.60 | +1.54 | 1.026 | 50.8% | -31 | -111 | +25 | 58.1% | +0.40 | 2–3 (40%) | 2–1 (67%) | 101.3 | -0.39 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 18 | 2007 | 1810 | 145.1 | +1.25 | +1.05 | 1.037 | 50.9% | -9 | -215 | -55 | 57.7% | +0.58 | 8–8 (50%) | 3–2 (60%) | 104.1 | -0.85 | 2009 | 1558 | 119.4 | -1.06 | +1.66 | 1.024 | 50.6% | +11 | — | — | 50.0% | +0.08 | 2–2 (50%) | 2–2 (50%) | 102.0 | +0.20 |
| 19 | 2008 | 1914 | 152.0 | +2.51 | +4.81 | 1.167 | 53.4% | -49 | -105 | +11 | 66.0% | +1.18 | 14–7 (67%) | 7–7 (50%) | 104.2 | +0.97 | 2010 | 1565 | 115.7 | -2.81 | +0.01 | 0.923 | 48.1% | +27 | -48 | +36 | 41.1% | -0.68 | 3–7 (30%) | 1–0 | — | -0.25 |
| 20 | 2009 | 1913 | 151.3 | +2.63 | +4.78 | 1.172 | 53.5% | -27 | -59 | +42 | 62.8% | +0.99 | 11–9 (55%) | 4–10 (29%) | 92.8 | +1.49 | 2011 | 1489 | 107.6 | -1.48 | -2.00 | 0.870 | 47.1% | +59 | — | — | 27.3% | -1.55 | 0–4 (0%) | 1–0 | — | +0.22 |
| 21 | 2010 | 1862 | 156.5 | +3.54 | +5.02 | 1.197 | 53.9% | +37 | -47 | +77 | 66.0% | +1.38 | 2–8 (20%) | 4–3 (57%) | 91.3 | +2.07 | 2012 | 1579 | 117.3 | -2.25 | -0.69 | 0.939 | 48.7% | +62 | — | — | 44.2% | -0.47 | 2–3 (40%) | 4–2 (67%) | 100.8 | -0.04 |
| 22 | 2011 | 1980 | 161.2 | +4.42 | +6.19 | 1.237 | 54.8% | +22 | -148 | -85 | 67.3% | +1.27 | 12–11 (52%) | 6–9 (40%) | 94.9 | +2.26 | 2013 | 1532 | 98.7 | -1.81 | -0.42 | 0.946 | 49.0% | +42 | — | — | 25.0% | -1.17 | 1–1 | 0–2 | — | +0.21 |
| 23 | 2012 | 1989 | 163.4 | +4.85 | +5.61 | 1.223 | 54.4% | +44 | -42 | -81 | 72.4% | +1.53 | 11–7 (61%) | 5–3 (63%) | 99.8 | +0.14 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 24 | 2013 | 1966 | 161.1 | +5.04 | +4.68 | 1.217 | 54.2% | +44 | -43 | -7 | 70.9% | +1.54 | 10–5 (67%) | 12–5 (71%) | 103.6 | +1.71 | 2015 | 1529 | 107.9 | -0.55 | -0.03 | 1.007 | 50.3% | +36 | — | — | 33.3% | -0.33 | — | — | — | -0.01 |
| 25 | 2014 | 1877 | 160.3 | +2.22 | +5.84 | 1.190 | 53.9% | +20 | +68 | +42 | 63.6% | +1.24 | 8–7 (53%) | 7–5 (58%) | 99.1 | +1.73 | 2016 | 1603 | 113.2 | -1.35 | +0.69 | 1.031 | 50.7% | +29 | — | — | 41.2% | +0.18 | 2–1 (67%) | — | — | +0.28 |
| 26 | 2015 | 1962 | 156.6 | +4.09 | +5.26 | 1.249 | 54.7% | +2 | -94 | -3 | 67.3% | +1.52 | 9–13 (41%) | 3–6 (33%) | 90.4 | -0.24 | 2017 | 1537 | 106.9 | -5.20 | -1.20 | 0.751 | 43.4% | +36 | — | — | 17.4% | -2.39 | 1–0 | 1–1 | — | -0.21 |
| 27 | 2016 | 1980 | 161.7 | +4.05 | +6.47 | 1.245 | 54.9% | +48 | -113 | -53 | 72.2% | +1.73 | 8–10 (44%) | 8–6 (57%) | 94.0 | +0.07 | 2018 | 1536 | 102.0 | -0.12 | -0.26 | 1.065 | 51.5% | — | — | — | 50.0% | +0.50 | — | 0–1 | — | +0.27 |
| 28 | 2017 | 1823 | 139.7 | +1.38 | +2.93 | 1.090 | 51.9% | +30 | +27 | +110 | 57.7% | +0.56 | 5–6 (45%) | 5–3 (63%) | 94.9 | +1.52 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 29 | 2018 | 1752 | 134.0 | -1.95 | +0.83 | 0.927 | 48.2% | +14 | — | +160 | 47.6% | -0.17 | 7–2 (78%) | 4–1 (80%) | 107.0 | -0.80 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 2104 | 161.3 | +3.16 | +4.74 | 1.175 | 53.6% | +16 | -74 | +8 | 65.6% | +1.20 | 107–96 (53%) | 70–61 (53%) | 95.2 | +1.29 | — | 1646 | 117.6 | -2.39 | -0.31 | 0.921 | 48.2% | +38 | -48 | +36 | 37.7% | -0.76 | 11–18 (38%) | 9–8 (53%) | 98.4 | +0.74 |
Each player's five most-played main-draw opponents. The current matchup is highlighted when it appears in a player's top five.
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Victoria Azarenka | 5 | 13 | 18 | Mar 27, 2018 | H2H |
| Caroline Wozniacki | 6 | 11 | 17 | Aug 11, 2017 | H2H |
| Svetlana Kuznetsova | 4 | 13 | 17 | Jul 11, 2017 | H2H |
| Petra Kvitova | 6 | 8 | 14 | Aug 22, 2018 | H2H |
| Maria Sharapova | 2 | 12 | 14 | Oct 25, 2015 | H2H |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Shuai Zhang | 2 | 1 | 3 | Jul 27, 2017 | H2H |
| Shuai Peng | 0 | 3 | 3 | Mar 2, 2017 | H2H |
| Iveta Benesova | 1 | 2 | 3 | Jul 30, 2012 | H2H |
| Tamarine Tanasugarn | 1 | 2 | 3 | Feb 10, 2012 | H2H |
| Qiang Wang | 0 | 2 | 2 | Oct 12, 2017 | H2H |