Wins
41
Indexed tournament wins
Player record
John Yoon
Losses
32
Indexed tournament losses
Matches
73
Decisive results
Win rate
56.2%
Across indexed matches
Peak rating
1,978
Highest rating in the available history.
Biggest upset
Adam Jackovino
36th St. Joseph Valley Open · May 27, 2001 · +195 rating
Open →Biggest loss
Spenser Lam
2025 Edgeball Chicago International Open · Oct 25, 2025 · -24 rating
Open →Most frequent opponent
Jason Miller
3 matches
Open →Rating trajectory
Published rating movement across recorded events.
Tournament history
10 tournament appearances · synced Aug 8, 2026, 2:37 AM
| Date | Tournament | Rating in | Rating after | Points changed | Record |
|---|---|---|---|---|---|
| Oct 25, 2025 | 2025 Edgeball Chicago International OpenTournament · View matches | 1,978 | 1,968 | -10+0 / -10 | 2W / 1L |
| Dec 29, 2012 | Aurora Winter OpenTournament · View matches | 1,959 | 1,978 | +19+37 / -18 | 5W / 2L |
| Jul 31, 2010 | Schaumburg Summer OpenTournament · View matches | 1,934 | 1,959 | +25+45 / -20 | 3W / 5L |
| Dec 30, 2007 | Killerspin Holiday OpenTournament · View matches | 1,934 | 1,934 | 0+6 / -6 | 2W / 3L |
| Mar 18, 2007 | 42nd St. Joseph Valley OpenTournament · View matches | 1,930 | 1,934 | +4+15 / -11 | 5W / 2L |
| May 18, 2002 | Chicago Table Tennis Club TourTournament · View matches | 1,837 | 1,930 | +93 | 5W / 4L |
| Oct 20, 2001 | Fox Valley OpenTournament · View matches | 1,846 | 1,837 | -9+0 / -9 | 0W / 3L |
| May 27, 2001 | 36th St. Joseph Valley OpenTournament · View matches · USATT readjusted 1,664 → 1,835 | 1,664 | 1,846 | +11+50 / -39 | 12W / 7L |
| Feb 10, 2001 | Schaumburg Open - ILTournament · View matches | 1,654 | 1,664 | +10+10 / 0 | 2W / 3L |
| Sep 22, 2000 | Chicago Ping Pong 2000Tournament · View matches · Initial rating 1,654 | Unrated | 1,654 | — | 5W / 2L |
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