H2H data updated: 2026-09-14 00:00 UTC

Ayumi Morita vs Katie Obrien H2H: 1-0

Ayumi Morita holds a 1–0 lead over Katie Obrien in their WTA head-to-head. Across 1 main-draw meeting, Ayumi Morita leads 1–0 on grass. Most recently, Ayumi Morita won the 2006 Birmingham round of 64 6-4 2-6 6-1.

Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.

Ayumi Morita
Japan Age 36 Right-Handed 164 cm / 5'5"
H2H
1 – 0
1 main-draw meetings
Katie Obrien
GBR Right-Handed 167 cm / 5'6"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Ayumi Morita #264 6-4 2-6 6-1 Katie Obrien #232 Match data Jun 14, 2006* 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
Ayumi Morita #1,117 #40 1,345 1,700 83 127 39.5% 0 0 0 0 0 0
Katie Obrien #782 #84 769 1,514 9 34 20.9% 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.

Ayumi Morita Katie Obrien
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
2005 0–1 0.0% #318 1,493 0 0 2004 0–1 0.0% #387 1,492 0 0
2006 2–1 66.7% #180 1,519 0 0 2005 0–1 0.0% #267 1,492 0 0
2007 6–6 50.0% #138 1,580 0 0 2006 0–3 0.0% #187 1,461 0 0
2008 6–11 35.3% #86 1,593 0 0 2007 4–3 57.1% #127 1,501 0 0
2009 10–21 32.3% #83 1,509 0 0 2008 2–8 20.0% #159 1,450 0 0
2010 9–17 34.6% #73 1,491 0 0 2009 1–9 10.0% #88 1,390 0 0
2011 20–25 44.4% #49 1,581 0 0 2010 2–8 20.0% #179 1,370 0 0
2012 9–20 31.0% #85 1,539 0 0 2011 0–1 0.0% #357 1,365 0 0
2013 18–21 46.2% #60 1,572 0 0 — — — — — — —
2014 3–4 42.9% #248 1,573 0 0 — — — — — — —

Surface Results by Career Season

Rows are aligned in career order because complete birth data is unavailable. 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.

Ayumi Morita Katie Obrien
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 %
2005 0 1 1 0.0% — — — — — — — — 2004 — — — — — — — — 0 1 1 0.0%
2006 — — — — — — — — 2 1 3 66.7% 2005 — — — — — — — — 0 1 1 0.0%
2007 4 4 8 50.0% — — — — 2 2 4 50.0% 2006 — — — — — — — — 0 3 3 0.0%
2008 5 7 12 41.7% 1 3 4 25.0% 0 1 1 0.0% 2007 2 1 3 66.7% — — — — 2 2 4 50.0%
2009 6 13 19 31.6% 4 6 10 40.0% 0 2 2 0.0% 2008 1 3 4 25.0% 0 2 2 0.0% 1 3 4 25.0%
2010 5 10 15 33.3% 2 5 7 28.6% 2 2 4 50.0% 2009 1 4 5 20.0% 0 3 3 0.0% 0 2 2 0.0%
2011 15 18 33 45.5% 4 5 9 44.4% 1 2 3 33.3% 2010 1 4 5 20.0% 1 2 3 33.3% 0 2 2 0.0%
2012 5 15 20 25.0% 3 3 6 50.0% 1 2 3 33.3% 2011 — — — — — — — — 0 1 1 0.0%
2013 14 14 28 50.0% 4 4 8 50.0% 0 3 3 0.0% — — — — — — — — — — — — —
2014 3 4 7 42.9% — — — — — — — — — — — — — — — — — — — — —
Career 57 86 143 39.9% 18 26 44 40.9% 8 15 23 34.8% Career 5 12 17 29.4% 1 7 8 12.5% 3 15 18 16.7%

Performance Progression by Career Season

Rows are aligned in career order because complete birth data is unavailable. Detailed serve and return statistics available for 194/209 of Ayumi Morita's and 31/42 of Katie Obrien'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.

Ayumi Morita Katie Obrien
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%
2006 3/3 1.7 3.7 67.9% 62.8% 50.9% 47.3% 65.1% 58.9% 45.0% 2005 1/1 0.0 4.0 51.2% 63.6% 47.6% 0.0% — 55.8% 20.0%
2007 11/12 0.5 3.4 59.4% 56.3% 47.5% 39.8% 47.6% 52.8% 40.3% 2006 2/3 1.5 6.0 58.1% 57.7% 42.1% 37.9% 62.5% 51.1% 42.8%
2008 14/17 0.4 2.3 61.8% 54.5% 44.0% 46.0% 45.0% 50.0% 43.4% 2007 4/7 2.3 5.3 55.7% 62.5% 36.7% 44.9% 36.4% 51.4% 42.2%
2009 28/31 0.9 2.4 63.9% 56.7% 43.1% 46.5% 49.0% 51.7% 41.1% 2008 6/10 1.5 6.7 54.5% 62.6% 43.3% 54.5% 42.0% 53.7% 42.6%
2010 25/26 1.3 1.7 68.1% 58.6% 46.8% 47.8% 47.3% 54.6% 41.4% 2009 9/10 1.2 6.6 59.0% 54.7% 35.8% 45.2% 44.2% 46.9% 39.4%
2011 41/45 0.7 1.9 67.7% 57.3% 46.1% 50.7% 50.8% 54.0% 43.4% 2010 8/10 1.6 6.3 59.5% 54.8% 39.7% 41.7% 33.7% 49.0% 37.8%
2012 26/29 0.5 1.5 61.4% 57.6% 46.3% 48.3% 47.0% 52.8% 41.2% 2011 1/1 2.0 5.0 62.9% 46.2% 30.4% 41.7% 60.0% 40.3% 37.5%
2013 39/39 1.1 1.7 63.4% 59.4% 43.3% 47.2% 47.5% 53.3% 40.1% — —/— — — — — — — — — —
2014 7/7 1.7 2.1 63.3% 50.7% 47.6% 43.2% 56.7% 49.7% 38.0% — —/— — — — — — — — — —
Career 194/210 0.9 2.0 64.4% 57.4% 45.3% 47.4% 48.7% 53.0% 41.5% Career 31/43 1.5 6.2 57.6% 57.5% 39.0% 44.0% 40.3% 49.7% 39.5%

Advanced Statistics Comparison by Career Season

Rows are aligned in career order because complete birth data is unavailable. 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.

Ayumi Morita Katie Obrien
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
2005 1494 104.4 — — — — — — — 0.0% -2.00 — — — -0.21 2004 1492 98.4 — — — — — — — 0.0% -2.00 — — — -0.06
2006 1519 102.2 +1.30 +0.12 1.096 52.3% — — +115 62.5% +0.50 1–1 — — +0.20 2005 1492 103.3 +4.63 +2.47 0.453 37.5% — — — 0.0% -3.50 — — — -0.29
2007 1581 112.6 -1.21 -2.90 0.853 46.9% -27 — +79 48.1% -0.67 2–1 (67%) 0–1 — -0.87 2006 1462 94.0 -0.38 +0.43 0.876 47.0% — — +15 25.0% -1.50 0–2 0–1 — +0.02
2008 1594 118.1 -3.04 +0.17 0.867 47.0% -4 -65 — 38.5% -1.36 2–3 (40%) 2–1 (67%) 101.2 -0.99 2007 1502 98.4 -1.08 -1.93 0.868 46.8% +35 — +18 53.3% -0.33 1–0 1–0 — +0.89
2009 1509 112.7 -2.81 -2.13 0.851 46.5% +27 +15 — 40.3% -0.48 3–5 (38%) 0–4 (0%) 95.2 +1.33 2008 1451 98.3 -1.41 -1.77 0.920 48.4% +67 — +20 30.8% -1.19 2–4 (33%) 3–0 (100%) — +0.44
2010 1491 104.6 -1.00 -2.22 0.913 47.8% +2 -13 +95 40.4% -0.56 2–5 (29%) 2–3 (40%) 95.1 +1.31 2009 1391 89.7 -5.01 -2.96 0.742 43.3% +96 +66 — 21.7% -2.04 0–3 (0%) 0–1 — +0.39
2011 1581 128.3 -1.15 -0.28 0.944 48.8% +6 -49 -35 48.5% -0.26 7–10 (41%) 5–4 (56%) 100.3 +1.00 2010 1371 97.5 -2.84 -3.79 0.741 43.8% +103 +65 — 29.2% -1.67 1–3 (25%) 1–0 — +0.42
2012 1539 121.0 -2.33 -2.09 0.874 47.0% -19 +36 +28 40.4% -0.65 2–5 (29%) 1–2 (33%) 97.2 +0.05 2011 1366 99.1 -2.49 -4.08 0.628 39.1% — — — 0.0% -4.00 — — — -0.01
2013 1572 122.1 -1.70 -2.81 0.859 46.8% +14 +20 -125 48.8% -0.43 6–4 (60%) 3–1 (75%) 105.0 -0.02 — — — — — — — — — — — — — — — —
2014 1573 103.7 -2.70 -1.82 0.755 44.4% +11 — — 46.2% -1.38 1–0 3–0 (100%) — -0.21 — — — — — — — — — — — — — — — —
2017 1558 99.8 — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
Career 1701 122.1 -1.80 -1.71 0.884 47.4% +4 -6 +32 44.4% -0.56 26–34 (43%) 16–16 (50%) 99.6 +0.76 Career 1514 93.8 -2.56 -2.45 0.785 44.8% +80 +66 +18 29.4% -1.51 4–12 (25%) 5–2 (71%) 95.3 +4.19

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.