Cecil Mamiit defeated Hiu Tung Yu 6-1 6-1 in the Ho Chi Minh City q16 on carpet. The result followed the form book — Cecil Mamiit came in leading the head-to-head 1–0. Cecil Mamiit extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-03-06 | Davis Cup G2 R1: HKG vs PHI | RR | hard | Cecil Mamiit | 7-6 6-1 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.