H2H data updated: 2026-10-18 00:00 UTC
Compare the head-to-head record, career totals, season-by-season performance, and match log for Woong-Sun Jun vs Yuichi Ito.
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| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Yuichi Ito | 4-6 7-6(4) 6-3 | Woong-Sun Jun | Match data | Sep 29, 2008 | Q1 | Japan Open | International Series Gold → modern equivalent ATP 500 | 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.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Woong-Sun Jun | #1,482 | #230 | 276 | 1,610 | 1 | 7 | 12.5% | 0 | 0 | 0 | 0 | 0 | 0 |
| Yuichi Ito | #1,862 | #325 | 121 | 1,518 | 0 | 1 | 0.0% | 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.
| Age | Woong-Sun Jun | Yuichi Ito | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 21 | 2007 | 0–3 | 0.0% | #330 | 1,587 | 0 | 0 | 2008 | 0–1 | 0.0% | #668 | 1,500 | 0 | 0 |
| 22 | 2008 | 1–4 | 20.0% | #268 | 1,537 | 0 | 0 | — | — | — | — | — | — | — |
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 | Woong-Sun Jun | Yuichi Ito | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | |||
| 21 | 2007 | 0 | 3 | 3 | 0.0% | — | — | — | — | — | — | — | — | 2008 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 22 | 2008 | 1 | 2 | 3 | 33.3% | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 1 | 5 | 6 | 16.7% | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
Seasons are aligned by the age each player spent most of that calendar year. 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 | Woong-Sun Jun | Yuichi Ito | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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% | |
| 21 | 2007 | 3/3 | 2.7 | 2.0 | 54.7% | 63.8% | 43.5% | 57.1% | 37.2% | 55.0% | 33.4% | 2008 | 1/1 | 1.0 | 0.0 | 66.0% | 57.1% | 38.9% | 33.3% | 33.3% | 50.9% | 32.1% |
| 22 | 2008 | 5/5 | 3.2 | 2.6 | 59.3% | 74.5% | 42.2% | 53.6% | 11.9% | 61.8% | 31.2% | — | —/— | — | — | — | — | — | — | — | — | — |
| Career | — | 8/8 | 3.0 | 2.4 | 57.6% | 70.5% | 42.7% | 54.9% | 21.4% | 59.2% | 32.0% | — | 1/1 | 1.0 | 0.0 | 66.0% | 57.1% | 38.9% | 33.3% | 33.3% | 50.9% | 32.1% |
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 | Woong-Sun Jun | Yuichi Ito | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| 20 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2007 | 1484 | 95.7 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 21 | 2007 | 1587 | 110.6 | -1.41 | -2.70 | 0.741 | 44.8% | +2 | — | — | 0.0% | -2.50 | — | 0–1 | — | -0.02 | 2008 | 1501 | 97.5 | -3.61 | -0.95 | 0.655 | 41.3% | — | — | — | 0.0% | -3.50 | — | — | — | +0.11 |
| 22 | 2008 | 1538 | 110.2 | -1.77 | -1.29 | 0.817 | 45.2% | +12 | — | — | 27.3% | -1.64 | 0–1 | 1–0 | — | +0.47 | 2009 | 1489 | 98.2 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 23 | 2009 | 1467 | 96.2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 24 | 2010 | 1477 | 103.4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 25 | 2011 | 1464 | 97.4 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2012 | 1472 | 95.8 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 2012 | 1450 | 98.5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 27 | 2013 | 1455 | 104.3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 28 | 2014 | 1446 | 95.1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 29 | 2015 | 1437 | 101.9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 1610 | 106.7 | -1.64 | -1.82 | 0.786 | 45.0% | +7 | — | — | 17.6% | -1.94 | 0–1 | 1–1 | — | +5.63 | — | 1518 | 94.2 | -3.61 | -0.95 | 0.655 | 41.3% | — | — | — | 0.0% | -3.50 | — | — | — | +11.00 |
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 |
|---|---|---|---|---|---|
| Philipp Kohlschreiber | 0 | 1 | 1 | Jul 31, 2008 | H2H |
| James Blake | 0 | 1 | 1 | Jul 18, 2008 | H2H |
| Chris Guccione | 1 | 0 | 1 | Jul 17, 2008 | H2H |
| Donald Young | 0 | 1 | 1 | Jul 10, 2008 | H2H |
| Pablo Cuevas | 0 | 1 | 1 | May 21, 2008 | H2H |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Joseph Sirianni | 0 | 1 | 1 | Oct 1, 2008 | H2H |