Gouichi Motomura defeated Paradorn Srichaphan 6-3 7-6 6-1 in the THA vs JPN round robin on hard. The upset overturned the form book — Paradorn Srichaphan came in leading the head-to-head 3–1, but Gouichi Motomura had been the form player, winning 5 of their last 9 on hard. Gouichi Motomura narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-04-07 | Davis Cup G1 R2: THA vs JPN | RR | hard | Paradorn Srichaphan | 6-4 7-6 6-1 |
| 2005-07-15 | Davis Cup G1 PO: JPN vs THA | RR | carpet | Paradorn Srichaphan | 6-4 7-6 6-0 |
| 2001-02-09 | Davis Cup G1 QF: JPN vs THA | RR | hard | Paradorn Srichaphan | 6-1 7-5 6-4 |
| 1999-03-17 | Japan F1 | SF | clay | Gouichi Motomura | 7-6 6-2 |
Averages over each player's completed matches in the selected window (13 vs 200). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About