H2H data updated: 2026-09-13 00:00 UTC

Casey Dellacqua vs Zi Yan H2H: 1-0

Casey Dellacqua holds a 1–0 lead over Zi Yan in their WTA head-to-head. Across 1 main-draw meeting, Casey Dellacqua leads 1–0 on grass. Most recently, Casey Dellacqua won the 2007 Birmingham round of 64 6-2 6-2.

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Casey Dellacqua
AUS Age 41 Left-Handed 165 cm / 5'5"
H2H
1 – 0
1 main-draw meetings
Zi Yan
HKG Age 41 Right-Handed 171 cm / 5'7"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Casey Dellacqua #123 6-2 6-2 Zi Yan #186 Match data Jun 13, 2007* R64 Birmingham Tier III → modern equivalent WTA 250 Grass

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.

Career Comparison

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
Casey Dellacqua #932 #26 1,725 1,757 80 106 43.0% 0 0 0 0 0 0
Zi Yan #789 #40 678 1,620 34 58 37.0% 0 0 0 0 1 1

Career Progression by Age

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 Casey Dellacqua Zi Yan
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
17 — — — — — — — 2002 0–1 0.0% #297 1,486 0 0
18 2003 0–1 0.0% #287 1,489 0 0 2003 2–3 40.0% #161 1,486 0 0
19 2004 0–2 0.0% #291 1,472 0 0 2004 0–4 0.0% #296 1,451 0 0
20 2005 1–2 33.3% #195 1,474 0 0 2005 8–4 66.7% #104 1,573 0 1
21 2006 3–4 42.9% #157 1,501 0 0 2006 6–16 27.3% #166 1,484 0 1
22 2007 6–12 33.3% #86 1,501 0 0 2007 10–12 45.5% #58 1,543 0 1
23 2008 18–17 51.4% #53 1,629 0 0 2008 7–14 33.3% #126 1,527 0 1
24 2009 0–3 0.0% #1002 1,597 0 0 2009 0–3 0.0% #306 1,486 0 1
25 2010 2–5 28.6% #227 1,563 0 0 2010 1–1 50.0% #422 1,495 0 1
26 2011 3–5 37.5% #134 1,541 0 0 — — — — — — —
27 2012 10–14 41.7% #101 1,592 0 0 — — — — — — —
28 2013 1–8 11.1% #142 1,490 0 0 — — — — — — —
29 2014 27–17 61.4% #29 1,741 0 0 — — — — — — —
30 2015 9–16 36.0% #116 1,628 0 0 — — — — — — —

Surface Results by Age

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 Casey Dellacqua Zi Yan
Yr HardClayGrass Yr HardClayGrass
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 — — — — — — — — — — — — — 2002 0 1 1 0.0% — — — — — — — —
18 2003 0 1 1 0.0% — — — — — — — — 2003 2 2 4 50.0% 0 1 1 0.0% — — — —
19 2004 0 2 2 0.0% — — — — — — — — 2004 0 3 3 0.0% 0 1 1 0.0% — — — —
20 2005 1 2 3 33.3% — — — — — — — — 2005 6 2 8 75.0% 2 2 4 50.0% — — — —
21 2006 3 4 7 42.9% — — — — — — — — 2006 2 10 12 16.7% 3 4 7 42.9% 1 2 3 33.3%
22 2007 5 9 14 35.7% 0 1 1 0.0% 1 2 3 33.3% 2007 8 7 15 53.3% 2 3 5 40.0% 0 2 2 0.0%
23 2008 11 9 20 55.0% 4 5 9 44.4% 3 3 6 50.0% 2008 5 9 14 35.7% 2 4 6 33.3% 0 1 1 0.0%
24 2009 0 3 3 0.0% — — — — — — — — 2009 0 2 2 0.0% 0 1 1 0.0% — — — —
25 2010 2 4 6 33.3% — — — — 0 1 1 0.0% 2010 1 1 2 50.0% — — — — — — — —
26 2011 0 1 1 0.0% 2 3 5 40.0% 1 1 2 50.0% — — — — — — — — — — — — —
27 2012 8 11 19 42.1% 0 1 1 0.0% 2 2 4 50.0% — — — — — — — — — — — — —
28 2013 1 7 8 12.5% — — — — 0 1 1 0.0% — — — — — — — — — — — — —
29 2014 19 12 31 61.3% 3 3 6 50.0% 5 2 7 71.4% — — — — — — — — — — — — —
30 2015 3 9 12 25.0% 1 3 4 25.0% 5 4 9 55.6% — — — — — — — — — — — — —
Career — 53 74 127 41.7% 10 16 26 38.5% 17 16 33 51.5% — 24 37 61 39.3% 9 16 25 36.0% 1 5 6 16.7%

Performance Progression by Age

Seasons are aligned by the age each player spent most of that calendar year. Detailed serve and return statistics available for 163/185 of Casey Dellacqua's and 52/70 of Zi Yan'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 Casey Dellacqua Zi Yan
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%
19 2004 1/2 2.0 6.0 53.4% 56.4% 41.2% 66.7% 37.5% 49.3% 43.8% — —/— — — — — — — — — —
20 2005 1/3 1.0 7.0 54.3% 63.2% 50.0% 33.3% 42.9% 57.1% 36.8% — —/— — — — — — — — — —
21 2006 1/7 1.0 7.0 47.4% 55.6% 40.0% 60.0% 0.0% 47.4% 26.5% 2006 10/22 1.8 3.3 64.1% 56.8% 43.0% 56.3% 48.9% 52.2% 41.1%
22 2007 17/18 1.8 3.6 60.5% 60.6% 44.5% 42.3% 53.2% 54.1% 44.7% 2007 18/22 1.3 2.6 65.3% 60.0% 45.6% 47.1% 55.2% 54.9% 44.5%
23 2008 31/35 2.9 4.3 58.6% 63.1% 44.2% 54.4% 49.5% 55.4% 45.2% 2008 20/21 0.9 3.6 63.5% 56.5% 41.5% 49.7% 43.3% 51.0% 44.6%
24 2009 3/3 1.0 5.3 52.8% 46.5% 36.2% 28.4% 13.9% 42.2% 38.4% 2009 2/3 1.0 4.5 62.7% 53.0% 39.2% 33.3% 47.3% 47.8% 44.6%
25 2010 7/7 1.0 3.4 53.5% 55.2% 40.5% 37.9% 37.3% 48.1% 42.3% 2010 2/2 0.0 2.5 62.7% 53.2% 38.5% 39.3% 33.6% 47.7% 39.0%
26 2011 6/8 2.0 4.5 64.2% 60.4% 45.9% 63.2% 81.9% 55.0% 44.2% — —/— — — — — — — — — —
27 2012 22/24 1.0 3.8 62.7% 59.3% 39.5% 49.5% 47.4% 51.8% 43.4% — —/— — — — — — — — — —
28 2013 9/9 0.9 3.0 61.8% 57.4% 45.2% 49.0% 53.9% 52.6% 33.7% — —/— — — — — — — — — —
29 2014 41/44 1.7 3.0 59.5% 62.2% 49.4% 54.3% 48.9% 56.9% 43.5% — —/— — — — — — — — — —
30 2015 24/25 2.0 3.3 62.4% 61.9% 50.1% 52.0% 50.0% 57.4% 39.6% — —/— — — — — — — — — —
Career — 163/186 1.8 3.6 60.1% 60.8% 45.6% 50.9% 49.4% 54.6% 42.6% — 52/92 1.2 3.2 64.2% 57.5% 43.0% 49.1% 48.3% 52.3% 43.7%

Advanced Statistics Comparison by Age

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 Casey Dellacqua Zi Yan
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 — — — — — — — — — — — — — — — — 2002 1486 99.3 — — — — — — — 0.0% -2.50 — — — +0.03
18 2003 1489 100.3 — — — — — — — 33.3% -2.33 0–1 1–0 — +0.02 2003 1486 101.9 — — — — +30 — — 45.5% -0.09 0–1 1–1 — +0.26
19 2004 1473 96.4 -3.43 -1.30 0.865 46.6% — — — 0.0% -2.50 — — — -0.14 2004 1451 99.1 — — — — +21 — — 27.3% -1.82 0–3 (0%) 1–0 — -0.09
20 2005 1475 101.7 -1.70 -1.14 0.860 46.6% +3 — — 42.9% -1.14 0–1 0–1 — -0.05 2005 1573 115.2 — — — — +3 -61 — 60.0% +0.80 2–1 (67%) 2–2 (50%) 101.7 +0.28
21 2006 1501 113.4 -0.08 -1.23 0.504 37.7% -2 — — 37.5% -1.00 2–0 1–1 — -0.22 2006 1485 107.1 -2.70 -1.75 0.860 47.0% -6 +46 +98 32.0% -1.34 2–4 (33%) 2–2 (50%) 98.8 -0.22
22 2007 1502 122.1 -1.56 -0.63 0.973 49.3% +17 — +91 43.2% -0.18 1–7 (13%) — — -0.01 2007 1543 115.3 -0.92 0.00 0.986 49.7% +13 -15 — 37.8% -0.64 4–3 (57%) 2–0 — +1.07
23 2008 1630 126.8 -0.29 +1.02 1.014 50.2% +9 -98 -24 47.5% -0.18 8–6 (57%) 2–5 (29%) 103.0 +0.09 2008 1528 117.9 -2.92 -0.04 0.910 47.8% +36 -10 — 31.9% -1.15 4–3 (57%) 1–0 — -0.15
24 2009 1598 101.9 -2.95 -1.13 0.664 40.6% +4 — — 0.0% -3.67 — 0–1 — -0.17 2009 1486 98.3 -0.13 -1.41 0.855 46.2% — — — 14.3% -2.00 0–1 — — +0.21
25 2010 1563 103.6 -3.53 -0.93 0.814 45.4% +23 — — 31.3% -1.50 1–1 2–2 (50%) — +0.55 2010 1495 98.7 -4.24 -2.37 0.747 44.1% — — — 40.0% -1.80 1–0 1–0 — +0.07
26 2011 1541 104.0 -1.59 -2.06 0.982 49.7% — -17 — 42.1% -0.26 1–2 (33%) 1–0 — +0.43 — — — — — — — — — — — — — — — —
27 2012 1593 122.1 -1.70 -0.55 0.901 47.8% -3 — +45 42.3% -0.52 4–2 (67%) 0–2 — -0.51 — — — — — — — — — — — — — — — —
28 2013 1490 95.2 -2.07 -4.32 0.712 44.0% +4 — — 15.8% -2.16 0–1 0–2 — +1.12 — — — — — — — — — — — — — — — —
29 2014 1742 139.6 +0.67 +0.45 1.011 50.3% -28 -176 -39 55.2% +0.23 13–6 (68%) 4–5 (44%) 108.7 +0.21 — — — — — — — — — — — — — — — —
30 2015 1629 117.9 -0.10 -0.71 0.929 48.4% -22 -90 +90 43.1% -0.65 1–7 (13%) 3–3 (50%) 93.4 -0.22 — — — — — — — — — — — — — — — —
31 2016 1613 — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
Career — 1758 127.4 -0.70 -0.33 0.939 48.7% -5 -99 +29 43.8% -0.46 31–34 (48%) 14–22 (39%) 100.0 +0.60 — 1621 114.0 -2.13 -0.50 0.916 48.1% +15 -3 +98 36.5% -0.88 13–16 (45%) 10–5 (67%) 102.5 +1.60

Career Rivalries

Each player's five most-played main-draw opponents. The current matchup is highlighted when it appears in a player's top five.