H2H data updated: 2026-10-29 00:00 UTC
Ekaterina Ivanova holds a 1–0 lead over Katie Obrien in their WTA head-to-head. Across 1 main-draw meeting, Ekaterina Ivanova leads 1–0 on hard courts. Most recently, Ekaterina Ivanova won the 2010 Tashkent round of 32 7-5 6-1.
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| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Ekaterina Ivanova | 7-5 6-1 | Katie Obrien | Match data | Sep 23, 2010* | R32 | Tashkent | International → modern equivalent WTA 250 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Katie Obrien | — | #84 | 769 | 1,514 | 9 | 34 | 20.9% | 0 | 0 | 0 | 0 | 0 | 0 |
| Ekaterina Ivanova | — | #136 | 464 | 1,507 | 10 | 17 | 37.0% | 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.
| Katie Obrien | Ekaterina Ivanova | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles |
| 2004 | 0–1 | 0.0% | #387 | 1,492 | 0 | 0 | 2007 | 1–3 | 25.0% | #211 | 1,477 | 0 | 0 |
| 2005 | 0–1 | 0.0% | #267 | 1,492 | 0 | 0 | 2008 | 2–3 | 40.0% | #156 | 1,480 | 0 | 0 |
| 2006 | 0–3 | 0.0% | #187 | 1,461 | 0 | 0 | 2009 | 2–3 | 40.0% | #141 | 1,481 | 0 | 0 |
| 2007 | 4–3 | 57.1% | #127 | 1,502 | 0 | 0 | 2010 | 3–6 | 33.3% | #152 | 1,467 | 0 | 0 |
| 2008 | 2–8 | 20.0% | #159 | 1,450 | 0 | 0 | 2011 | 2–2 | 50.0% | #156 | 1,498 | 0 | 0 |
| 2009 | 1–9 | 10.0% | #88 | 1,390 | 0 | 0 | — | — | — | — | — | — | — |
| 2010 | 2–8 | 20.0% | #179 | 1,370 | 0 | 0 | — | — | — | — | — | — | — |
| 2011 | 0–1 | 0.0% | #357 | 1,365 | 0 | 0 | — | — | — | — | — | — | — |
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.
| Katie Obrien | Ekaterina Ivanova | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | ||
| 2004 | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% | 2007 | 1 | 2 | 3 | 33.3% | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 2005 | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% | 2008 | 0 | 1 | 1 | 0.0% | 2 | 2 | 4 | 50.0% | — | — | — | — |
| 2006 | — | — | — | — | — | — | — | — | 0 | 3 | 3 | 0.0% | 2009 | 1 | 1 | 2 | 50.0% | 1 | 2 | 3 | 33.3% | — | — | — | — |
| 2007 | 2 | 1 | 3 | 66.7% | — | — | — | — | 2 | 2 | 4 | 50.0% | 2010 | 3 | 4 | 7 | 42.9% | 0 | 2 | 2 | 0.0% | — | — | — | — |
| 2008 | 1 | 3 | 4 | 25.0% | 0 | 2 | 2 | 0.0% | 1 | 3 | 4 | 25.0% | 2011 | 2 | 2 | 4 | 50.0% | — | — | — | — | — | — | — | — |
| 2009 | 1 | 4 | 5 | 20.0% | 0 | 3 | 3 | 0.0% | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2010 | 1 | 4 | 5 | 20.0% | 1 | 2 | 3 | 33.3% | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2011 | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | 5 | 12 | 17 | 29.4% | 1 | 7 | 8 | 12.5% | 3 | 15 | 18 | 16.7% | Career | 7 | 10 | 17 | 41.2% | 3 | 7 | 10 | 30.0% | — | — | — | — |
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.
| Katie Obrien | Ekaterina Ivanova | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| 2004 | 1492 | 98.4 | — | — | — | — | — | — | — | 0.0% | -2.00 | — | — | — | -0.06 | 2007 | 1477 | 93.9 | — | — | — | — | +32 | — | — | 22.2% | -2.00 | 1–0 | — | — | +0.23 |
| 2005 | 1492 | 103.3 | +4.63 | +2.47 | 0.453 | 37.5% | — | — | — | 0.0% | -3.50 | — | — | — | -0.29 | 2008 | 1480 | 97.0 | — | — | — | — | — | +49 | — | 38.5% | -1.08 | 2–1 (67%) | 0–1 | — | +0.23 |
| 2006 | 1462 | 94.0 | -0.38 | +0.43 | 0.876 | 47.0% | — | — | +15 | 25.0% | -1.50 | 0–2 | 0–1 | — | +0.02 | 2009 | 1482 | 100.2 | — | — | — | — | — | +42 | — | 45.5% | -0.64 | 0–1 | 1–0 | — | +0.25 |
| 2007 | 1502 | 98.4 | -1.08 | -1.93 | 0.868 | 46.8% | +33 | — | +20 | 53.3% | -0.33 | 1–0 | 1–0 | — | +0.91 | 2010 | 1468 | 97.8 | — | — | — | — | +37 | — | — | 40.9% | -1.23 | 1–3 (25%) | 2–0 | — | +0.71 |
| 2008 | 1451 | 98.1 | -1.41 | -1.77 | 0.920 | 48.4% | +65 | — | +20 | 30.8% | -1.19 | 2–4 (33%) | 3–0 (100%) | — | +0.46 | 2011 | 1498 | 108.0 | — | — | — | — | +33 | — | — | 40.0% | -1.20 | 2–0 | — | — | +0.06 |
| 2009 | 1390 | 89.6 | -5.01 | -2.96 | 0.742 | 43.3% | +96 | +67 | — | 21.7% | -2.04 | 0–3 (0%) | 0–1 | — | +0.40 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2010 | 1370 | 97.3 | -2.84 | -3.79 | 0.741 | 43.8% | +103 | +67 | — | 29.2% | -1.67 | 1–3 (25%) | 1–0 | — | +0.43 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2011 | 1365 | 99.1 | -2.49 | -4.08 | 0.628 | 39.1% | — | — | — | 0.0% | -4.00 | — | — | — | -0.01 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | 1514 | 93.7 | -2.56 | -2.45 | 0.785 | 44.8% | +80 | +67 | +19 | 29.4% | -1.51 | 4–12 (25%) | 5–2 (71%) | 95.2 | +4.33 | Career | 1508 | 98.7 | — | — | — | — | +35 | +46 | — | 38.5% | -1.20 | 6–5 (55%) | 3–1 (75%) | 104.8 | +5.48 |
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 |
|---|---|---|---|---|---|
| Alla Kudryavtseva | 1 | 1 | 2 | Sep 17, 2009 | H2H |
| Monica Niculescu | 0 | 2 | 2 | Jul 16, 2009 | H2H |
| Olga Govortsova | 0 | 2 | 2 | May 26, 2009 | H2H |
| Kimiko Date | 0 | 1 | 1 | Jun 22, 2011 | H2H |
| Ekaterina Ivanova | 0 | 1 | 1 | Sep 23, 2010 | H2H |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Elena Vesnina | 0 | 1 | 1 | Oct 21, 2011 | H2H |
| Jelena Jankovic | 1 | 0 | 1 | Oct 20, 2011 | H2H |
| Marion Bartoli | 0 | 1 | 1 | Mar 4, 2011 | H2H |
| Nina Bratchikova | 1 | 0 | 1 | Mar 3, 2011 | H2H |
| Monica Niculescu | 0 | 1 | 1 | Sep 24, 2010 | H2H |