H2H data updated: 2026-10-08 00:00 UTC

Marta Kostyuk vs Sloane Stephens H2H: 2-0

Marta Kostyuk holds a 2–0 lead over Sloane Stephens in their WTA head-to-head. Across 2 main-draw meetings, Marta Kostyuk leads 2–0 on hard courts. Most recently, Marta Kostyuk won the 2026 US Open second round 6-1 7-5.

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Marta Kostyuk
Ukraine Age 24 Right-Handed 175 cm / 5'9"
H2H
2 – 0
2 main-draw meetings
Sloane Stephens
United States Age 33 Right-Handed 170 cm / 5'7"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Marta Kostyuk #11 6-1 7-5 Sloane Stephens #209 Match data Sep 2, 2026 R64 US Open Grand Slam Hard
Marta Kostyuk #11 7-5 7-5 Sloane Stephens #240 Match data Aug 18, 2026 R32 Cincinnati Open WTA 1000 Hard

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
Marta Kostyuk #10 #10 4,040 2,109 162 118 57.9% 0 1 0 0 2 3
Sloane Stephens #136 #3 5,727 1,952 305 250 55.0% 1 1 0 1 5 8

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 Marta Kostyuk Sloane Stephens
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
16 2018 3–5 37.5% #119 1,515 0 0 — — — — — — —
17 2019 2–3 40.0% #153 1,615 0 0 2010 2–3 40.0% #204 1,519 0 0
18 2020 2–5 28.6% #99 1,661 0 0 2011 7–9 43.8% #96 1,580 0 0
19 2021 19–16 54.3% #50 1,739 0 0 2012 21–17 55.3% #38 1,709 0 0
20 2022 16–20 44.4% #69 1,754 0 0 2013 40–22 64.5% #12 1,827 0 0
21 2023 23–20 53.5% #39 1,810 0 1 2014 20–19 51.3% #36 1,732 0 0
22 2024 36–20 64.3% #18 1,889 0 1 2015 34–20 63.0% #30 1,787 0 1
23 2025 25–19 56.8% #26 1,890 0 1 2016 21–10 67.7% #35 1,755 0 4
24 2026 36–10 78.3% #10 2,056 0 3 2017 15–8 65.2% #13 1,863 1 5
25 — — — — — — — 2018 34–19 64.2% #6 1,920 1 6
26 — — — — — — — 2019 22–19 53.7% #25 1,786 1 6
27 — — — — — — — 2020 4–11 26.7% #39 1,641 1 6
28 — — — — — — — 2021 18–17 51.4% #65 1,759 1 6
29 — — — — — — — 2022 18–17 51.4% #37 1,785 1 7
30 — — — — — — — 2023 21–20 51.2% #47 1,789 1 7
31 — — — — — — — 2024 19–21 47.5% #74 1,688 1 8
32 — — — — — — — 2025 0–5 0.0% #479 1,603 1 8
33 — — — — — — — 2026 9–13 40.9% #136 1,709 1 8

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 Marta Kostyuk Sloane Stephens
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 %
16 2018 2 2 4 50.0% 1 2 3 33.3% 0 1 1 0.0% — — — — — — — — — — — — —
17 2019 0 1 1 0.0% 2 2 4 50.0% — — — — 2010 1 1 2 50.0% 1 2 3 33.3% — — — —
18 2020 2 3 5 40.0% 0 2 2 0.0% — — — — 2011 6 6 12 50.0% 1 3 4 25.0% — — — —
19 2021 11 10 21 52.4% 6 3 9 66.7% 2 3 5 40.0% 2012 12 10 22 54.5% 7 6 13 53.8% 2 1 3 66.7%
20 2022 12 14 26 46.2% 1 4 5 20.0% 3 2 5 60.0% 2013 29 16 45 64.4% 7 5 12 58.3% 4 1 5 80.0%
21 2023 20 15 35 57.1% 1 3 4 25.0% 2 2 4 50.0% 2014 11 10 21 52.4% 6 6 12 50.0% 3 3 6 50.0%
22 2024 26 12 38 68.4% 8 5 13 61.5% 2 3 5 40.0% 2015 20 13 33 60.6% 8 5 13 61.5% 6 2 8 75.0%
23 2025 19 13 32 59.4% 6 3 9 66.7% 0 3 3 0.0% 2016 10 6 16 62.5% 9 3 12 75.0% 2 1 3 66.7%
24 2026 15 8 23 65.2% 16 1 17 94.1% 5 1 6 83.3% 2017 15 7 22 68.2% — — — — 0 1 1 0.0%
25 — — — — — — — — — — — — — 2018 24 13 37 64.9% 10 5 15 66.7% 0 1 1 0.0%
26 — — — — — — — — — — — — — 2019 10 13 23 43.5% 10 4 14 71.4% 2 2 4 50.0%
27 — — — — — — — — — — — — — 2020 3 8 11 27.3% 1 3 4 25.0% — — — —
28 — — — — — — — — — — — — — 2021 6 11 17 35.3% 10 5 15 66.7% 2 1 3 66.7%
29 — — — — — — — — — — — — — 2022 13 9 22 59.1% 5 6 11 45.5% 0 2 2 0.0%
30 — — — — — — — — — — — — — 2023 12 14 26 46.2% 8 5 13 61.5% 1 1 2 50.0%
31 — — — — — — — — — — — — — 2024 8 13 21 38.1% 9 5 14 64.3% 2 3 5 40.0%
32 — — — — — — — — — — — — — 2025 0 5 5 0.0% — — — — — — — —
33 — — — — — — — — — — — — — 2026 8 9 17 47.1% 1 4 5 20.0% — — — —
Career — 107 78 185 57.8% 41 25 66 62.1% 14 15 29 48.3% — 188 164 352 53.4% 93 67 160 58.1% 24 19 43 55.8%

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 262/280 of Marta Kostyuk's and 523/555 of Sloane Stephens'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 Marta Kostyuk Sloane Stephens
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 2018 8/8 4.8 6.9 54.1% 68.7% 45.4% 47.7% 63.8% 57.4% 40.3% — —/— — — — — — — — — —
17 2019 5/5 2.6 3.6 60.9% 63.8% 47.8% 48.7% 44.7% 57.2% 45.0% 2010 5/5 0.6 3.6 64.1% 58.7% 39.2% 42.2% 62.2% 52.1% 42.9%
18 2020 7/7 3.6 5.3 62.0% 64.8% 43.4% 60.9% 35.8% 56.2% 42.0% 2011 16/16 1.4 3.0 59.3% 59.3% 47.2% 41.8% 52.7% 54.1% 43.8%
19 2021 35/35 2.7 3.9 62.7% 61.9% 45.2% 51.6% 45.5% 55.6% 44.0% 2012 36/38 1.7 3.6 62.4% 61.6% 46.4% 48.6% 43.2% 55.6% 45.1%
20 2022 35/36 3.4 5.3 60.8% 64.4% 41.0% 48.5% 40.3% 55.5% 42.6% 2013 58/62 2.1 2.7 64.9% 63.2% 45.5% 49.3% 49.5% 56.8% 44.8%
21 2023 43/43 3.1 6.0 57.0% 66.3% 43.4% 48.0% 49.1% 56.5% 43.6% 2014 37/39 1.7 2.4 68.3% 62.0% 46.2% 53.8% 38.4% 57.0% 41.9%
22 2024 50/56 3.0 6.8 57.2% 65.8% 44.1% 52.9% 53.3% 56.6% 44.8% 2015 44/54 2.4 2.3 61.6% 65.6% 54.6% 58.0% 54.1% 61.5% 42.6%
23 2025 34/44 3.0 5.8 59.5% 67.7% 46.0% 62.0% 49.1% 58.9% 45.1% 2016 29/31 2.0 1.8 65.8% 64.5% 49.5% 52.7% 47.8% 59.4% 44.8%
24 2026 45/46 4.0 4.2 57.6% 71.2% 47.6% 59.3% 53.1% 61.2% 47.9% 2017 22/23 1.1 1.5 67.7% 61.0% 47.2% 59.8% 54.5% 56.6% 41.8%
25 — —/— — — — — — — — — — 2018 47/53 0.8 1.5 69.8% 62.1% 49.9% 51.8% 51.5% 58.5% 47.2%
26 — —/— — — — — — — — — — 2019 39/41 1.0 1.7 69.4% 59.9% 47.7% 47.6% 43.1% 56.2% 44.2%
27 — —/— — — — — — — — — — 2020 15/15 2.2 2.0 69.5% 61.1% 47.1% 50.2% 44.4% 56.6% 40.0%
28 — —/— — — — — — — — — — 2021 35/35 1.5 2.1 69.1% 59.7% 46.9% 57.7% 45.3% 55.7% 42.8%
29 — —/— — — — — — — — — — 2022 35/35 1.2 2.1 71.3% 60.8% 45.5% 51.6% 51.8% 56.4% 44.7%
30 — —/— — — — — — — — — — 2023 40/41 1.1 2.2 69.4% 60.6% 45.7% 51.1% 51.2% 56.1% 43.8%
31 — —/— — — — — — — — — — 2024 40/40 0.8 1.6 72.9% 58.8% 49.8% 46.9% 39.1% 55.9% 42.6%
32 — —/— — — — — — — — — — 2025 3/5 1.0 2.7 64.5% 54.1% 31.3% 50.1% 42.1% 46.2% 40.7%
33 — —/— — — — — — — — — — 2026 22/22 1.0 2.1 67.5% 58.0% 49.0% 52.9% 45.9% 55.1% 39.6%
Career — 262/280 3.2 5.4 58.9% 66.4% 44.7% 53.6% 49.0% 57.4% 44.6% — 523/555 1.5 2.2 67.4% 61.4% 47.8% 51.6% 47.6% 56.9% 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 Marta Kostyuk Sloane Stephens
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
15 2017 1483 97.0 — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
16 2018 1516 118.6 -0.89 -0.21 0.947 49.5% -2 +68 — 44.4% -0.33 0–2 — — +0.60 — — — — — — — — — — — — — — — —
17 2019 1616 118.9 -1.57 +1.09 1.053 50.9% — +68 — 53.8% +0.23 0–3 (0%) — — -0.05 2010 1519 108.2 -1.34 +0.26 0.895 47.8% — +19 — 40.0% -1.10 — 2–0 — -0.36
18 2020 1661 127.8 -0.40 -0.50 0.959 49.2% -2 — — 37.5% -0.88 0–2 2–1 (67%) — -0.16 2011 1581 116.3 -0.64 -0.35 0.955 48.8% +19 -78 — 40.6% -0.69 1–1 2–0 — +0.03
19 2021 1740 135.9 -0.54 +0.60 0.990 49.9% -34 +9 -154 53.2% +0.27 4–5 (44%) 3–5 (38%) 98.1 -0.69 2012 1709 130.0 +0.14 +1.30 1.016 50.3% -38 -86 -53 52.7% +0.20 9–8 (53%) 5–5 (50%) 102.2 +0.59
20 2022 1754 134.9 -0.66 +0.17 0.957 49.2% +1 -64 -136 46.5% -0.19 8–8 (50%) 5–4 (56%) 99.5 -1.22 2013 1827 148.1 +1.68 +1.63 1.037 50.8% -16 -126 -97 58.2% +0.39 17–7 (71%) 8–6 (57%) 109.7 +0.29
21 2023 1811 147.6 +0.01 +1.37 1.002 50.2% +7 -145 -163 51.0% +0.05 10–8 (56%) 9–5 (64%) 103.7 -1.77 2014 1733 132.5 +1.10 -0.90 0.974 49.4% +23 -27 -2 51.7% -0.02 5–6 (45%) 5–3 (63%) 100.3 +0.75
22 2024 1890 152.6 +0.62 +2.38 1.033 50.9% +29 -120 -214 57.5% +0.47 16–5 (76%) 11–6 (65%) 113.1 -0.25 2015 1787 143.0 +3.00 +2.02 1.106 52.3% -23 -18 -9 60.9% +0.54 5–8 (38%) 10–1 (91%) 104.6 -2.66
23 2025 1890 156.7 +2.04 +2.03 1.097 51.9% +45 -52 -342 55.2% +0.57 9–8 (53%) 3–8 (27%) 96.3 +1.49 2016 1756 122.0 +2.14 +0.81 1.106 52.0% -20 +53 +23 60.9% +0.56 7–2 (78%) 8–2 (80%) 107.2 +0.83
24 2026 2056 166.0 +4.38 +5.61 1.235 54.5% -67 +52 -274 71.2% +1.69 10–4 (71%) 4–6 (40%) 103.5 -2.49 2017 1864 153.6 +0.98 +1.17 0.964 49.2% +11 — — 57.7% +0.35 8–0 (100%) 4–2 (67%) 111.8 -1.70
25 — — — — — — — — — — — — — — — — 2018 1921 157.9 +2.48 +3.98 1.139 52.7% +6 -17 — 61.0% +0.94 10–9 (53%) 3–7 (30%) 96.1 -0.56
26 — — — — — — — — — — — — — — — — 2019 1786 136.3 -0.49 +1.33 1.009 50.2% -24 +182 -21 52.6% -0.19 7–6 (54%) 11–2 (85%) 104.6 +1.76
27 — — — — — — — — — — — — — — — — 2020 1641 114.3 +0.15 -1.60 0.922 48.1% +16 +243 — 37.8% -0.68 1–6 (14%) 1–1 — +1.57
28 — — — — — — — — — — — — — — — — 2021 1760 134.1 -0.59 +0.37 0.967 49.3% -115 +157 +83 52.4% -0.19 6–8 (43%) 3–5 (38%) 97.2 -0.75
29 — — — — — — — — — — — — — — — — 2022 1785 140.6 -0.05 +2.25 1.024 50.4% +9 +46 — 50.6% +0.06 7–8 (47%) 2–2 (50%) 98.7 +0.24
30 — — — — — — — — — — — — — — — — 2023 1790 135.6 -0.42 +1.25 0.998 49.9% -56 +122 — 50.5% +0.02 6–7 (46%) 3–6 (33%) 94.4 -0.37
31 — — — — — — — — — — — — — — — — 2024 1689 137.0 -0.42 -0.12 0.965 49.0% -19 +171 +35 47.3% -0.11 6–5 (55%) 1–2 (33%) — -1.59
32 — — — — — — — — — — — — — — — — 2025 1604 109.9 -1.24 +0.23 0.757 43.6% -34 — — 16.7% -2.34 0–2 — — -0.11
33 — — — — — — — — — — — — — — — — 2026 1710 132.4 -1.38 -2.15 0.881 47.6% -18 +45 — 40.4% -1.00 2–1 (67%) 4–2 (67%) 103.1 -0.23
Career — 2110 153.3 +0.91 +2.01 1.046 51.1% +3 -23 -209 55.4% +0.44 57–45 (56%) 37–35 (51%) 104.3 -1.64 — 1952 145.6 +0.67 +1.05 1.013 50.2% -17 +47 -9 53.1% +0.11 97–84 (54%) 72–46 (61%) 108.0 -0.41

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.