Gouichi Motomura defeated Danai Udomchoke 6-3 6-2 in the JPN vs THA round robin on hard. The upset overturned the form book — Danai Udomchoke came in leading the head-to-head 2–0, but Gouichi Motomura had been the form player, winning 4 of their last 8 on hard. Gouichi Motomura claimed a first win over Danai Udomchoke in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-08-25 | US Open | Q128 | hard | Danai Udomchoke | 6-3 6-4 |
| 2002-04-05 | Davis Cup G1 SF: THA vs JPN | RR | hard | Danai Udomchoke | 7-5 6-2 |
Averages over each player's completed matches in the selected window (15 vs 89). 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