Go Soeda defeated Cecil Mamiit 6-7 6-3 6-3 6-3 in the JPN vs PHI round robin on carpet. The result followed the form book — Go Soeda came in leading the head-to-head 2–1. Go Soeda extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-03-04 | Davis Cup G1 R1: PHI vs JPN | RR | hard | Go Soeda | 7-6 6-2 3-6 6-3 |
| 2006-08-23 | US Open | Q128 | hard | Go Soeda | 6-1 6-2 |
| 2005-06-20 | USA F14 | R16 | hard | Cecil Mamiit | 6-1 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.