Kayla Day
all rivalries →| 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 |
H2H data updated: 2026-08-31 00:00 UTC
Kayla Day vs Julieta Pareja
Compare the head-to-head record, career totals, season-by-season performance, and match log for Kayla Day vs Julieta Pareja.
Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.
H2H
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0 main draw meetings
H2H Match Log
| Winner | Score | Loser | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Julieta Pareja | 6-3 6-1 | Kayla Day | Match data | Aug 24, 2026 | Q1 | US Open | Grand Slam | Hard |
1 qualifying meeting shown in the table; qualifying is excluded from the H2H score. 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Kayla Day | #117 | #84 | 847 | 1,637 | 9 | 29 | 23.7% | 0 | 0 | 0 | 0 | 0 | 0 |
| Julieta Pareja | #288 | #269 | 254 | 1,601 | 4 | 4 | 50.0% | 0 | 0 | 0 | 0 | 0 | 0 |
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 | Kayla Day | Julieta Pareja | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 2025 | 3–2 | 60.0% | #346 | 1,559 | 0 | 0 |
| 17 | 2017 | 3–5 | 37.5% | #150 | 1,524 | 0 | 0 | 2026 | 1–2 | 33.3% | #288 | 1,587 | 0 | 0 |
| 18 | 2018 | 0–2 | 0.0% | #313 | 1,487 | 0 | 0 | — | — | — | — | — | — | — |
| 22 | 2022 | 0–2 | 0.0% | #197 | 1,534 | 0 | 0 | — | — | — | — | — | — | — |
| 23 | 2023 | 3–6 | 33.3% | #87 | 1,564 | 0 | 0 | — | — | — | — | — | — | — |
| 24 | 2024 | 0–7 | 0.0% | #241 | 1,435 | 0 | 0 | — | — | — | — | — | — | — |
| 26 | 2026 | 2–5 | 28.6% | #117 | 1,607 | 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 | Kayla Day | Julieta Pareja | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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% | — | — | — | — | — | — | — | — | 2025 | 0 | 1 | 1 | 0.0% | 3 | 1 | 4 | 75.0% | — | — | — | — |
| 17 | 2017 | 3 | 4 | 7 | 42.9% | 0 | 1 | 1 | 0.0% | — | — | — | — | 2026 | 0 | 1 | 1 | 0.0% | 1 | 1 | 2 | 50.0% | — | — | — | — |
| 18 | 2018 | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 2022 | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 23 | 2023 | 1 | 4 | 5 | 20.0% | 2 | 2 | 4 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 24 | 2024 | 0 | 3 | 3 | 0.0% | 0 | 3 | 3 | 0.0% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 2026 | 2 | 3 | 5 | 40.0% | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 7 | 20 | 27 | 25.9% | 2 | 7 | 9 | 22.2% | 0 | 2 | 2 | 0.0% | — | 0 | 2 | 2 | 0.0% | 4 | 2 | 6 | 66.7% | — | — | — | — |
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 38/38 of Kayla Day's and 4/8 of Julieta Pareja'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 | Kayla Day | Julieta Pareja | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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% | 2025 | 1/5 | 0.0 | 9.0 | 55.4% | 61.3% | 32.0% | 55.6% | — | 48.2% | 15.8% |
| 17 | 2017 | 8/8 | 3.4 | 5.5 | 48.8% | 66.2% | 45.1% | 51.9% | 31.0% | 55.7% | 38.9% | 2026 | 3/3 | 1.3 | 8.3 | 58.9% | 55.1% | 46.7% | 60.7% | 45.0% | 51.3% | 43.3% |
| 18 | 2018 | 2/2 | 5.0 | 6.0 | 48.1% | 68.0% | 33.7% | 50.0% | 35.0% | 49.8% | 33.8% | — | —/— | — | — | — | — | — | — | — | — | — |
| 22 | 2022 | 2/2 | 4.0 | 2.5 | 66.5% | 68.4% | 39.1% | 56.4% | 50.0% | 58.6% | 36.6% | — | —/— | — | — | — | — | — | — | — | — | — |
| 23 | 2023 | 9/9 | 2.2 | 3.0 | 58.1% | 62.9% | 43.8% | 57.4% | 39.7% | 55.0% | 39.3% | — | —/— | — | — | — | — | — | — | — | — | — |
| 24 | 2024 | 7/7 | 3.7 | 3.3 | 66.8% | 58.5% | 42.2% | 52.8% | 37.1% | 55.1% | 36.5% | — | —/— | — | — | — | — | — | — | — | — | — |
| 26 | 2026 | 7/7 | 4.0 | 3.4 | 65.2% | 59.9% | 47.6% | 52.6% | 46.8% | 55.8% | 40.7% | — | —/— | — | — | — | — | — | — | — | — | — |
| Career | — | 38/38 | 3.2 | 3.8 | 59.0% | 62.2% | 42.6% | 53.5% | 41.1% | 54.4% | 38.4% | — | 4/8 | 1.0 | 8.5 | 58.0% | 56.7% | 43.0% | 59.4% | 33.8% | 50.6% | 36.4% |
Advanced Statistics Comparison by Age
Seasons are aligned by the age each player spent most of that calendar year. Metrics are precomputed from eligible main-draw results; point-stat values use the available detailed sample. 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 | Kayla Day | Julieta Pareja | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Elo | P+ | Serve+ | Return+ | PD | TPW% | Hard Elo | Clay Elo | Grass Elo | Set Win % | Set Margin | Dec. Set | Tiebreak | Schedule | Yr | Elo | P+ | Serve+ | Return+ | PD | TPW% | Hard Elo | Clay Elo | Grass Elo | Set Win % | Set Margin | Dec. Set | Tiebreak | Schedule | |
| 15 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2024 | 1503 | 96.9 | — | — | — | — | — | — | — | — | — | — | — | — |
| 16 | 2016 | 1540 | 107.8 | -2.89 | +0.53 | 0.685 | 42.0% | +14 | — | — | 0.0% | -4.75 | — | — | -0.17 | 2025 | 1559 | 115.4 | -1.58 | -0.49 | 0.305 | 35.1% | — | +54 | — | 60.0% | +0.30 | — | 2–0 | +0.52 |
| 17 | 2017 | 1524 | 111.0 | -0.02 | -2.37 | 0.877 | 47.2% | +13 | — | — | 45.0% | -0.85 | 1–3 (25%) | — | -0.14 | 2026 | 1588 | 113.2 | -3.30 | -0.33 | 0.889 | 47.4% | — | — | — | 42.9% | -0.71 | 0–1 | 0–1 | +0.28 |
| 18 | 2018 | 1487 | 91.2 | -2.87 | -2.16 | 0.673 | 41.8% | — | — | — | 20.0% | -3.20 | 0–1 | — | +0.16 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 19 | 2019 | 1463 | 99.5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 2020 | 1450 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 2022 | 1535 | 99.5 | -0.90 | -1.76 | 0.884 | 47.0% | — | — | — | 0.0% | -2.00 | — | 0–1 | +0.44 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 23 | 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 | 2024 | 1436 | 102.7 | -2.31 | -3.54 | 0.812 | 46.2% | -2 | +63 | — | 22.2% | -1.61 | 0–4 (0%) | 1–3 (25%) | +0.78 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 25 | 2025 | 1481 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 2026 | 1607 | 129.9 | +0.06 | +0.10 | 0.921 | 48.5% | -18 | — | — | 35.3% | -0.94 | 1–2 (33%) | 1–1 | -0.60 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 1638 | 116.1 | -1.03 | -1.62 | 0.842 | 46.7% | -9 | +30 | — | 29.9% | -1.39 | 3–10 (23%) | 2–6 (25%) | +2.84 | — | 1602 | 112.5 | -2.87 | -0.37 | 0.736 | 44.3% | — | +54 | — | 52.9% | -0.12 | 0–1 | 2–1 (67%) | +11.43 |
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.
Julieta Pareja
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Xinyu Wang | 0 | 1 | 1 | Jul 28, 2026 | H2H |
| Panna Udvardy | 0 | 1 | 1 | Apr 1, 2026 | H2H |
| Elizabeth Mandlik | 1 | 0 | 1 | Mar 30, 2026 | H2H |
| Elena Rybakina | 0 | 1 | 1 | Aug 25, 2025 | H2H |
| Leolia Jeanjean | 1 | 0 | 1 | Apr 5, 2025 | H2H |