| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-04-26 | Fed Cup G1 PO: JPN vs THA | RR | hard | Ai Sugiyama | 4-6 6-3 6-4 |
| 2001-07-30 | San Diego | R64 | hard | Ai Sugiyama | 4-6 7-6(3) 6-2 |
| 2000-04-29 | Fed Cup G1 RRA: JPN vs THA | RR | hard | Tamarine Tanasugarn | 6-1 6-3 |
| 1999-09-20 | Tokyo | R32 | hard | Ai Sugiyama | 6-3 6-3 |
Averages from each player's recent completed matches (20 vs 20). ATP, WTA & Challenger.