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

Sloane Stephens vs Monica Niculescu H2H: 3-1

Sloane Stephens holds a 3–1 lead over Monica Niculescu in their WTA head-to-head. Across 4 main-draw meetings, they are tied 1–1 on clay, while Sloane Stephens leads 2–0 on hard courts. Most recently, Sloane Stephens won the 2018 Miami Open third round 6-7(1) 6-3 4-0 RET.

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Sloane Stephens
United States Age 33 Right-Handed 170 cm / 5'7"
H2H
3 – 1
4 main-draw meetings
Monica Niculescu
Romania Age 38 Right-Handed 168 cm / 5'6"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Sloane Stephens #12 6-7(1) 6-3 4-0 (ret.) Monica Niculescu #70 Match data Mar 25, 2018* R32 Miami Open Premier Mandatory → modern equivalent WTA 1000 Hard
Sloane Stephens #34 6-4 6-2 Monica Niculescu #48 Match data Jan 14, 2015* R32 Hobart International International → modern equivalent WTA 250 Hard
Sloane Stephens #17 2-6 6-3 6-2 Monica Niculescu #78 Match data May 7, 2014* R64 Madrid Open Premier Mandatory → modern equivalent WTA 1000 Clay
Monica Niculescu #59 6-4 6-4 Sloane Stephens #170 Match data Apr 29, 2011* R16 Estoril International → modern equivalent WTA 250 Clay

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
Sloane Stephens #209 #3 5,727 1,952 303 249 54.9% 1 1 0 1 5 8
Monica Niculescu #958 #28 1,960 1,779 179 214 45.5% 0 0 0 0 3 3

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 Sloane Stephens Monica Niculescu
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
17 2010 2–3 40.0% #204 1,519 0 0 — — — — — — —
18 2011 7–9 43.8% #96 1,580 0 0 — — — — — — —
19 2012 21–17 55.3% #38 1,709 0 0 2007 0–1 0.0% #152 1,490 0 0
20 2013 40–22 64.5% #12 1,827 0 0 2008 8–15 34.8% #48 1,543 0 0
21 2014 20–19 51.3% #36 1,732 0 0 2009 10–22 31.2% #103 1,522 0 0
22 2015 34–20 63.0% #30 1,787 0 1 2010 6–9 40.0% #82 1,574 0 0
23 2016 21–10 67.7% #35 1,755 0 4 2011 21–15 58.3% #30 1,757 0 0
24 2017 15–8 65.2% #13 1,863 1 5 2012 15–23 39.5% #58 1,639 0 0
25 2018 34–19 64.2% #6 1,920 1 6 2013 22–21 51.2% #59 1,635 0 1
26 2019 22–19 53.7% #25 1,786 1 6 2014 22–19 53.7% #46 1,688 0 2
27 2020 4–11 26.7% #39 1,641 1 6 2015 20–21 48.8% #39 1,676 0 2
28 2021 18–17 51.4% #65 1,759 1 6 2016 26–19 57.8% #38 1,758 0 3
29 2022 18–17 51.4% #37 1,785 1 7 2017 12–19 38.7% #77 1,622 0 3
30 2023 21–20 51.2% #47 1,789 1 7 2018 9–15 37.5% #99 1,591 0 3
31 2024 19–21 47.5% #74 1,688 1 8 2019 8–10 44.4% #118 1,638 0 3
32 2025 0–5 0.0% #479 1,603 1 8 2020 0–2 0.0% #144 1,586 0 3
33 2026 7–12 36.8% #209 1,699 1 8 2021 0–3 0.0% #274 1,519 0 3

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 Sloane Stephens Monica Niculescu
Yr HardClayGrassCarpet Yr HardClayGrassCarpet
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 2010 1 1 2 50.0% 1 2 3 33.3% — — — — — — — — — — — — — — — — — — — — — — — — —
18 2011 6 6 12 50.0% 1 3 4 25.0% — — — — — — — — — — — — — — — — — — — — — — — — —
19 2012 12 10 22 54.5% 7 6 13 53.8% 2 1 3 66.7% — — — — 2007 0 1 1 0.0% — — — — — — — — — — — —
20 2013 29 16 45 64.4% 7 5 12 58.3% 4 1 5 80.0% — — — — 2008 6 10 16 37.5% 1 3 4 25.0% 1 2 3 33.3% — — — —
21 2014 11 10 21 52.4% 6 6 12 50.0% 3 3 6 50.0% — — — — 2009 6 13 19 31.6% 3 6 9 33.3% 0 2 2 0.0% 1 1 2 50.0%
22 2015 20 13 33 60.6% 8 5 13 61.5% 6 2 8 75.0% — — — — 2010 4 7 11 36.4% 1 1 2 50.0% 1 1 2 50.0% — — — —
23 2016 10 6 16 62.5% 9 3 12 75.0% 2 1 3 66.7% — — — — 2011 17 9 26 65.4% 3 4 7 42.9% 1 2 3 33.3% — — — —
24 2017 15 7 22 68.2% — — — — 0 1 1 0.0% — — — — 2012 12 15 27 44.4% 1 5 6 16.7% 1 2 3 33.3% 1 1 2 50.0%
25 2018 24 13 37 64.9% 10 5 15 66.7% 0 1 1 0.0% — — — — 2013 20 14 34 58.8% 2 4 6 33.3% 0 2 2 0.0% 0 1 1 0.0%
26 2019 10 13 23 43.5% 10 4 14 71.4% 2 2 4 50.0% — — — — 2014 18 14 32 56.3% 4 4 8 50.0% 0 1 1 0.0% — — — —
27 2020 3 8 11 27.3% 1 3 4 25.0% — — — — — — — — 2015 10 14 24 41.7% 3 3 6 50.0% 7 4 11 63.6% — — — —
28 2021 6 11 17 35.3% 10 5 15 66.7% 2 1 3 66.7% — — — — 2016 23 13 36 63.9% 2 5 7 28.6% 1 1 2 50.0% — — — —
29 2022 13 9 22 59.1% 5 6 11 45.5% 0 2 2 0.0% — — — — 2017 11 13 24 45.8% 0 4 4 0.0% 1 2 3 33.3% — — — —
30 2023 12 14 26 46.2% 8 5 13 61.5% 1 1 2 50.0% — — — — 2018 9 14 23 39.1% — — — — 0 1 1 0.0% — — — —
31 2024 8 13 21 38.1% 9 5 14 64.3% 2 3 5 40.0% — — — — 2019 7 8 15 46.7% — — — — 1 2 3 33.3% — — — —
32 2025 0 5 5 0.0% — — — — — — — — — — — — 2020 0 1 1 0.0% 0 1 1 0.0% — — — — — — — —
33 2026 6 8 14 42.9% 1 4 5 20.0% — — — — — — — — 2021 0 2 2 0.0% — — — — 0 1 1 0.0% — — — —
Career — 186 163 349 53.3% 93 67 160 58.1% 24 19 43 55.8% — — — — — 143 148 291 49.1% 20 40 60 33.3% 14 23 37 37.8% 2 3 5 40.0%

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 520/552 of Sloane Stephens's and 341/394 of Monica Niculescu'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 Sloane Stephens Monica Niculescu
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 2010 5/5 0.6 3.6 64.1% 58.7% 39.2% 42.2% 62.2% 52.1% 42.9% — —/— — — — — — — — — —
18 2011 16/16 1.4 3.0 59.3% 59.3% 47.2% 41.8% 52.7% 54.1% 43.8% — —/— — — — — — — — — —
19 2012 36/38 1.7 3.6 62.4% 61.6% 46.4% 48.6% 43.2% 55.6% 45.1% 2007 1/1 0.0 4.0 57.4% 45.2% 34.8% 25.0% 100.0% 40.7% 30.8%
20 2013 58/62 2.1 2.7 64.9% 63.2% 45.5% 49.3% 49.5% 56.8% 44.8% 2008 19/23 1.3 1.9 72.5% 54.5% 38.0% 41.9% 45.0% 49.9% 43.0%
21 2014 37/39 1.7 2.4 68.3% 62.0% 46.2% 53.8% 38.4% 57.0% 41.9% 2009 30/32 1.0 1.4 71.6% 55.9% 46.3% 44.0% 48.4% 52.8% 43.8%
22 2015 44/54 2.4 2.3 61.6% 65.6% 54.6% 58.0% 54.1% 61.5% 42.6% 2010 12/15 0.3 1.0 73.4% 53.0% 39.4% 47.7% 45.0% 49.3% 43.9%
23 2016 29/31 2.0 1.8 65.8% 64.5% 49.5% 52.7% 47.8% 59.4% 44.8% 2011 29/36 0.7 1.5 74.9% 55.3% 46.1% 44.2% 60.9% 52.3% 48.8%
24 2017 22/23 1.1 1.5 67.7% 61.0% 47.2% 59.8% 54.5% 56.6% 41.8% 2012 33/38 1.3 1.1 67.1% 58.0% 47.7% 51.8% 46.0% 54.3% 43.3%
25 2018 47/53 0.8 1.5 69.8% 62.1% 49.9% 51.8% 51.5% 58.5% 47.2% 2013 37/43 0.8 1.5 74.6% 59.2% 45.9% 47.0% 52.2% 55.3% 49.4%
26 2019 39/41 1.0 1.7 69.4% 59.9% 47.7% 47.6% 43.1% 56.2% 44.2% 2014 34/41 1.2 3.1 70.2% 60.8% 41.3% 50.8% 59.1% 55.0% 51.0%
27 2020 15/15 2.2 2.0 69.5% 61.1% 47.1% 50.2% 44.4% 56.6% 40.0% 2015 32/41 1.1 2.8 70.4% 60.4% 46.2% 47.8% 43.9% 55.9% 43.1%
28 2021 35/35 1.5 2.1 69.1% 59.7% 46.9% 57.7% 45.3% 55.7% 42.8% 2016 41/46 1.3 1.9 71.6% 57.0% 43.8% 43.2% 51.4% 53.4% 50.0%
29 2022 35/35 1.2 2.1 71.3% 60.8% 45.5% 51.6% 51.8% 56.4% 44.7% 2017 27/31 0.4 1.2 82.8% 52.1% 47.0% 51.7% 49.9% 51.2% 44.9%
30 2023 40/41 1.1 2.2 69.4% 60.6% 45.7% 51.1% 51.2% 56.1% 43.8% 2018 23/24 0.3 1.5 77.6% 55.6% 46.3% 46.4% 51.8% 53.0% 47.4%
31 2024 40/40 0.8 1.6 72.9% 58.8% 49.8% 46.9% 39.1% 55.9% 42.6% 2019 18/18 0.4 1.5 79.1% 56.5% 45.6% 37.0% 46.4% 54.6% 46.2%
32 2025 3/5 1.0 2.7 64.5% 54.1% 31.3% 50.1% 42.1% 46.2% 40.7% 2020 2/2 1.0 1.5 79.6% 49.7% 35.3% 49.4% 42.2% 46.7% 40.2%
33 2026 19/19 0.9 2.0 66.5% 57.5% 47.5% 54.6% 45.5% 54.2% 39.3% 2021 3/3 0.3 1.3 74.9% 47.5% 49.1% 46.0% 50.0% 46.5% 36.7%
Career — 520/552 1.5 2.2 67.3% 61.4% 47.7% 51.6% 47.6% 56.9% 43.7% — 341/394 0.9 1.8 73.4% 56.9% 44.8% 46.4% 50.7% 53.3% 46.5%

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 Sloane Stephens Monica Niculescu
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 2010 1519 108.2 -1.34 +0.26 0.895 47.8% — +19 — 40.0% -1.10 — 2–0 — -0.36 — — — — — — — — — — — — — — — —
18 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 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 2007 1491 98.2 -0.35 +1.13 0.519 36.6% — — — 0.0% -4.50 — — — +0.05
20 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 2008 1543 120.1 -2.90 -0.19 0.859 46.3% +10 -13 +47 34.6% -1.12 4–6 (40%) 1–2 (33%) 99.8 +0.05
21 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 2009 1523 112.7 -2.66 -0.26 0.928 48.0% +26 -22 — 34.7% -1.10 3–7 (30%) 2–1 (67%) — +0.79
22 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 2010 1574 117.8 -2.83 +0.34 0.866 46.8% -1 — — 41.7% -0.81 3–3 (50%) 1–2 (33%) 101.0 -0.32
23 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 2011 1758 133.3 -2.06 +3.84 1.021 50.5% -10 -238 -215 53.8% +0.41 7–3 (70%) 3–5 (38%) 103.5 +0.37
24 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 2012 1640 125.0 -1.30 -0.32 0.949 48.8% +48 -164 -85 42.4% -0.47 3–8 (27%) 6–1 (86%) 96.9 +0.44
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 2013 1635 132.6 -0.55 +4.14 1.104 52.3% +66 -181 — 52.1% +0.24 6–8 (43%) 4–2 (67%) 97.6 -0.53
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 2014 1688 140.2 -1.17 +5.03 1.133 53.0% +7 -148 — 57.1% +1.03 8–12 (40%) 2–6 (25%) 93.9 -0.85
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 2015 1677 131.5 -1.57 +1.81 0.978 49.6% -20 -106 -62 50.0% +0.03 10–10 (50%) 4–0 (100%) 105.1 -0.95
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 2016 1759 135.4 -1.87 +5.53 1.073 51.7% +23 -229 — 56.0% +0.42 8–6 (57%) 1–4 (20%) 100.6 +0.22
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 2017 1622 118.4 -3.66 +1.26 0.920 48.1% +24 -137 -27 40.9% -0.64 5–5 (50%) 3–2 (60%) 100.1 +0.21
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 2018 1591 133.1 -2.27 +2.61 1.010 50.2% +6 — — 39.6% -0.48 3–5 (38%) 1–2 (33%) — -0.38
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 2019 1638 129.0 -1.03 +1.89 1.019 50.3% +11 — -43 46.2% -0.05 3–4 (43%) 2–5 (29%) 98.8 -0.23
32 2025 1604 109.9 -1.23 +0.23 0.757 43.6% -34 — — 16.7% -2.34 0–2 — — -0.11 2020 1587 99.7 -1.05 +1.06 0.754 43.7% — — — 33.3% -2.34 0–2 — — -0.11
33 2026 1699 132.4 -1.61 -2.12 0.859 47.0% -20 +56 — 36.6% -1.20 2–1 (67%) 1–1 — -0.66 2021 1519 98.6 -2.42 -0.40 0.685 41.9% — — — 0.0% -3.17 — — — -0.37
35 — — — — — — — — — — — — — — — — 2023 1531 101.7 — — — — — — — — — — — — —
Career — 1952 145.6 +0.68 +1.07 1.013 50.2% -17 +47 -9 53.0% +0.11 97–84 (54%) 69–45 (61%) 107.5 -0.49 — 1780 134.0 -1.87 +2.44 0.996 49.9% +19 -140 -64 46.8% -0.13 63–79 (44%) 30–32 (48%) 97.9 -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.