H2H data updated: 2026-09-14 00:00 UTC
Garbiñe Muguruza holds a 2–0 lead over Kayla Day in their WTA head-to-head. Across 2 main-draw meetings, Garbiñe Muguruza leads 2–0 on hard courts. Most recently, Garbiñe Muguruza won the 2017 Stanford second round 6-2 6-0.
Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.
| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Garbiñe Muguruza | 6-2 6-0 | Kayla Day | Match data | Aug 4, 2017* | R16 | Stanford | Premier → modern equivalent WTA 500 | Hard |
| Garbiñe Muguruza | 3-6 7-5 6-2 | Kayla Day | Match data | Mar 13, 2017* | R32 | Indian Wells Open | Premier Mandatory → modern equivalent WTA 1000 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Garbiñe Muguruza | #1,129 | #1 | 6,766 | 2,061 | 312 | 182 | 63.2% | 2 | 3 | 1 | 1 | 3 | 10 |
| Kayla Day | #117 | #84 | 847 | 1,637 | 9 | 29 | 23.7% | 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 | Garbiñe Muguruza | Kayla Day | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 16 | — | — | — | — | — | — | — | 2016 | 1–2 | 33.3% | #198 | 1,540 | 0 | 0 |
| 17 | — | — | — | — | — | — | — | 2017 | 3–5 | 37.5% | #150 | 1,524 | 0 | 0 |
| 18 | 2012 | 6–8 | 42.9% | #109 | 1,543 | 0 | 0 | 2018 | 0–2 | 0.0% | #313 | 1,487 | 0 | 0 |
| 19 | 2013 | 14–12 | 53.8% | #63 | 1,668 | 0 | 0 | — | — | — | — | — | — | — |
| 20 | 2014 | 38–22 | 63.3% | #20 | 1,824 | 0 | 1 | — | — | — | — | — | — | — |
| 21 | 2015 | 39–19 | 67.2% | #3 | 1,954 | 0 | 2 | — | — | — | — | — | — | — |
| 22 | 2016 | 31–20 | 60.8% | #7 | 1,842 | 1 | 3 | 2022 | 0–2 | 0.0% | #197 | 1,534 | 0 | 0 |
| 23 | 2017 | 46–20 | 69.7% | #2 | 1,935 | 2 | 5 | 2023 | 3–6 | 33.3% | #87 | 1,564 | 0 | 0 |
| 24 | 2018 | 36–20 | 64.3% | #18 | 1,841 | 2 | 6 | 2024 | 0–7 | 0.0% | #241 | 1,435 | 0 | 0 |
| 25 | 2019 | 22–15 | 59.5% | #36 | 1,817 | 2 | 7 | — | — | — | — | — | — | — |
| 26 | 2020 | 23–8 | 74.2% | #15 | 1,941 | 2 | 7 | 2026 | 2–5 | 28.6% | #117 | 1,604 | 0 | 0 |
| 27 | 2021 | 45–17 | 72.6% | #3 | 2,005 | 2 | 10 | — | — | — | — | — | — | — |
| 28 | 2022 | 12–17 | 41.4% | #55 | 1,777 | 2 | 10 | — | — | — | — | — | — | — |
| 29 | 2023 | 0–4 | 0.0% | #1081 | 1,724 | 2 | 10 | — | — | — | — | — | — | — |
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 | Garbiñe Muguruza | Kayla Day | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Hard | Clay | Grass | Yr | Hard | Clay | Grass | |||||||||||||||||||
| W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | |||
| 16 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2016 | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — |
| 17 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2017 | 3 | 4 | 7 | 42.9% | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 18 | 2012 | 3 | 4 | 7 | 42.9% | 3 | 3 | 6 | 50.0% | 0 | 1 | 1 | 0.0% | 2018 | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — |
| 19 | 2013 | 8 | 6 | 14 | 57.1% | 2 | 4 | 6 | 33.3% | 4 | 2 | 6 | 66.7% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 2014 | 27 | 16 | 43 | 62.8% | 9 | 4 | 13 | 69.2% | 2 | 2 | 4 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 21 | 2015 | 25 | 12 | 37 | 67.6% | 7 | 4 | 11 | 63.6% | 7 | 3 | 10 | 70.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 2016 | 18 | 15 | 33 | 54.5% | 12 | 3 | 15 | 80.0% | 1 | 2 | 3 | 33.3% | 2022 | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — |
| 23 | 2017 | 30 | 14 | 44 | 68.2% | 6 | 4 | 10 | 60.0% | 10 | 2 | 12 | 83.3% | 2023 | 1 | 4 | 5 | 20.0% | 2 | 2 | 4 | 50.0% | — | — | — | — |
| 24 | 2018 | 27 | 14 | 41 | 65.9% | 7 | 4 | 11 | 63.6% | 2 | 2 | 4 | 50.0% | 2024 | 0 | 3 | 3 | 0.0% | 0 | 3 | 3 | 0.0% | 0 | 1 | 1 | 0.0% |
| 25 | 2019 | 17 | 11 | 28 | 60.7% | 5 | 3 | 8 | 62.5% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 2020 | 17 | 6 | 23 | 73.9% | 6 | 2 | 8 | 75.0% | — | — | — | — | 2026 | 2 | 3 | 5 | 40.0% | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% |
| 27 | 2021 | 38 | 12 | 50 | 76.0% | 3 | 3 | 6 | 50.0% | 4 | 2 | 6 | 66.7% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 28 | 2022 | 9 | 10 | 19 | 47.4% | 2 | 4 | 6 | 33.3% | 1 | 3 | 4 | 25.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 29 | 2023 | 0 | 4 | 4 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 219 | 124 | 343 | 63.8% | 62 | 38 | 100 | 62.0% | 31 | 20 | 51 | 60.8% | — | 7 | 20 | 27 | 25.9% | 2 | 7 | 9 | 22.2% | 0 | 2 | 2 | 0.0% |
Seasons are aligned by the age each player spent most of that calendar year. Detailed serve and return statistics available for 434/494 of Garbiñe Muguruza's and 38/39 of Kayla Day'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 | Garbiñe Muguruza | Kayla Day | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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% | |
| 16 | — | —/— | — | — | — | — | — | — | — | — | — | 2016 | 3/3 | 1.0 | 3.7 | 59.0% | 55.2% | 30.3% | 50.6% | 66.7% | 44.4% | 38.1% |
| 17 | — | —/— | — | — | — | — | — | — | — | — | — | 2017 | 8/8 | 3.4 | 5.5 | 48.8% | 66.2% | 45.1% | 51.9% | 31.0% | 55.7% | 38.9% |
| 18 | 2012 | 12/14 | 1.7 | 5.8 | 58.7% | 55.7% | 40.6% | 38.4% | 43.8% | 49.2% | 46.3% | 2018 | 2/2 | 5.0 | 6.0 | 48.1% | 68.0% | 33.7% | 50.0% | 35.0% | 49.8% | 33.8% |
| 19 | 2013 | 25/26 | 2.4 | 5.1 | 59.7% | 63.8% | 48.4% | 55.1% | 47.6% | 57.6% | 41.8% | — | —/— | — | — | — | — | — | — | — | — | — |
| 20 | 2014 | 50/60 | 3.4 | 4.4 | 60.6% | 64.0% | 46.6% | 55.5% | 50.0% | 57.3% | 46.8% | — | —/— | — | — | — | — | — | — | — | — | — |
| 21 | 2015 | 41/58 | 4.0 | 3.9 | 59.1% | 70.4% | 50.5% | 53.0% | 50.5% | 62.0% | 44.0% | — | —/— | — | — | — | — | — | — | — | — | — |
| 22 | 2016 | 42/51 | 3.9 | 3.8 | 60.9% | 70.6% | 47.4% | 60.1% | 52.9% | 61.4% | 45.6% | 2022 | 2/2 | 4.0 | 2.5 | 66.5% | 68.4% | 39.1% | 56.4% | 50.0% | 58.6% | 36.6% |
| 23 | 2017 | 58/66 | 2.7 | 2.4 | 64.8% | 66.3% | 48.9% | 57.3% | 53.0% | 59.9% | 46.0% | 2023 | 9/9 | 2.2 | 3.0 | 58.1% | 62.9% | 43.8% | 57.4% | 39.7% | 55.0% | 39.3% |
| 24 | 2018 | 53/56 | 2.9 | 2.3 | 65.2% | 67.6% | 47.7% | 57.7% | 48.8% | 60.7% | 47.2% | 2024 | 7/7 | 3.7 | 3.3 | 66.8% | 58.5% | 42.2% | 52.8% | 37.1% | 55.1% | 36.5% |
| 25 | 2019 | 36/37 | 2.9 | 2.7 | 64.0% | 64.2% | 47.7% | 59.0% | 52.9% | 58.4% | 44.5% | — | —/— | — | — | — | — | — | — | — | — | — |
| 26 | 2020 | 30/31 | 5.3 | 3.5 | 64.2% | 70.5% | 46.0% | 57.2% | 45.6% | 61.3% | 45.4% | 2026 | 7/8 | 4.0 | 3.4 | 65.3% | 59.9% | 47.4% | 52.6% | 46.8% | 55.8% | 40.7% |
| 27 | 2021 | 54/62 | 3.4 | 2.3 | 65.4% | 68.6% | 49.7% | 58.0% | 48.0% | 62.1% | 47.6% | — | —/— | — | — | — | — | — | — | — | — | — |
| 28 | 2022 | 29/29 | 2.9 | 2.9 | 62.8% | 65.1% | 43.9% | 52.2% | 51.1% | 57.1% | 40.7% | — | —/— | — | — | — | — | — | — | — | — | — |
| 29 | 2023 | 4/4 | 4.3 | 2.0 | 60.2% | 63.4% | 44.0% | 32.4% | 53.2% | 55.6% | 34.0% | — | —/— | — | — | — | — | — | — | — | — | — |
| Career | — | 434/494 | 3.3 | 3.2 | 62.8% | 66.9% | 47.7% | 56.0% | 50.1% | 59.7% | 45.3% | — | 38/39 | 3.2 | 3.8 | 59.1% | 62.2% | 42.6% | 53.5% | 41.1% | 54.4% | 38.4% |
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 | Garbiñe Muguruza | Kayla Day | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| 16 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2016 | 1540 | 107.8 | -2.89 | +0.53 | 0.685 | 42.0% | +14 | — | — | 0.0% | -4.75 | — | — | — | -0.17 |
| 17 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2017 | 1524 | 111.0 | 0.00 | -2.37 | 0.877 | 47.2% | +13 | — | — | 45.0% | -0.85 | 1–3 (25%) | — | — | -0.14 |
| 18 | 2012 | 1544 | 125.0 | -2.60 | +1.47 | 0.911 | 47.7% | +21 | +39 | — | 41.9% | -1.00 | 2–5 (29%) | 2–1 (67%) | — | -0.84 | 2018 | 1487 | 91.2 | -2.87 | -2.16 | 0.673 | 41.8% | — | — | — | 20.0% | -3.20 | 0–1 | — | — | +0.16 |
| 19 | 2013 | 1668 | 132.8 | +1.86 | -0.67 | 0.985 | 49.8% | +14 | -103 | -50 | 50.0% | 0.00 | 8–4 (67%) | 3–1 (75%) | 108.1 | -0.45 | 2019 | 1463 | 99.5 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 2014 | 1825 | 147.6 | +1.31 | +2.74 | 1.098 | 52.1% | 0 | -119 | -189 | 60.6% | +0.77 | 14–12 (54%) | 8–10 (44%) | 100.4 | +1.40 | 2020 | 1450 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 21 | 2015 | 1955 | 154.4 | +4.18 | +3.29 | 1.158 | 52.8% | -22 | -210 | -174 | 64.0% | +1.17 | 15–9 (63%) | 6–7 (46%) | 104.4 | -0.93 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 2016 | 1843 | 151.6 | +4.62 | +2.60 | 1.182 | 53.4% | -21 | +95 | -105 | 62.0% | +0.95 | 6–5 (55%) | 3–8 (27%) | 96.5 | +0.58 | 2022 | 1535 | 99.5 | -0.90 | -1.76 | 0.884 | 47.0% | — | — | — | 0.0% | -2.00 | — | 0–1 | — | +0.44 |
| 23 | 2017 | 1936 | 156.1 | +3.62 | +3.80 | 1.147 | 52.7% | -31 | +10 | +25 | 67.1% | +1.16 | 15–6 (71%) | 4–7 (36%) | 102.0 | +0.32 | 2023 | 1565 | 118.9 | -0.78 | -1.35 | 0.874 | 47.7% | -48 | +5 | — | 31.6% | -0.84 | 1–0 | 0–1 | — | +0.61 |
| 24 | 2018 | 1842 | 150.6 | +3.92 | +3.48 | 1.201 | 53.7% | +21 | +112 | +57 | 64.1% | +1.15 | 6–9 (40%) | 4–7 (36%) | 90.5 | +1.77 | 2024 | 1436 | 102.7 | -2.31 | -3.54 | 0.812 | 46.2% | -2 | +63 | — | 22.2% | -1.61 | 0–4 (0%) | 1–3 (25%) | 92.8 | +0.78 |
| 25 | 2019 | 1817 | 147.5 | +1.58 | +1.77 | 1.069 | 51.5% | +43 | +148 | — | 59.5% | +0.59 | 6–5 (55%) | 4–7 (36%) | 95.2 | -0.88 | 2025 | 1474 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 2020 | 1942 | 154.8 | +3.52 | +2.81 | 1.175 | 53.2% | +5 | +66 | — | 68.0% | +0.99 | 10–5 (67%) | 7–0 (100%) | 107.2 | -1.07 | 2026 | 1604 | 129.8 | -0.29 | -0.02 | 0.921 | 48.5% | -18 | — | — | 35.3% | -0.94 | 1–2 (33%) | 1–1 | — | -0.59 |
| 27 | 2021 | 2005 | 165.3 | +5.49 | +5.23 | 1.258 | 54.6% | +43 | -24 | -63 | 69.7% | +1.39 | 8–8 (50%) | 6–5 (55%) | 98.7 | -1.39 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 28 | 2022 | 1777 | 136.0 | +0.43 | -1.32 | 0.949 | 49.1% | +119 | +89 | +63 | 47.6% | -0.13 | 1–6 (14%) | 5–3 (63%) | 93.1 | +1.39 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 29 | 2023 | 1725 | 118.4 | -0.07 | -0.78 | 0.766 | 44.7% | +101 | — | — | 20.0% | -1.50 | 0–2 | 0–2 | — | -0.51 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 2062 | 158.1 | +3.08 | +2.71 | 1.124 | 52.4% | +13 | +6 | -55 | 61.6% | +0.84 | 91–76 (54%) | 52–58 (47%) | 97.0 | -0.13 | — | 1637 | 116.0 | -1.09 | -1.64 | 0.842 | 46.7% | -9 | +30 | — | 29.9% | -1.39 | 3–10 (23%) | 2–6 (25%) | 91.1 | +2.87 |
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 |
|---|---|---|---|---|---|
| Elina Svitolina | 3 | 8 | 11 | May 14, 2021 | H2H |
| Karolina Pliskova | 2 | 8 | 10 | Nov 10, 2021 | H2H |
| Angelique Kerber | 5 | 3 | 8 | Jul 11, 2017 | H2H |
| Agnieszka Radwanska | 4 | 4 | 8 | Oct 26, 2016 | H2H |
| Petra Kvitova | 1 | 6 | 7 | Sep 4, 2022 | H2H |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Madison Keys | 1 | 2 | 3 | Jun 30, 2026 | H2H |
| Caroline Dolehide | 0 | 2 | 2 | Apr 3, 2024 | H2H |
| Marie Bouzkova | 0 | 2 | 2 | Oct 12, 2023 | H2H |
| Garbiñe Muguruza | 0 | 2 | 2 | Aug 4, 2017 | H2H |
| Shuai Zhang | 0 | 1 | 1 | Aug 15, 2026 | H2H |