David Martin defeated Woong Sun Jun 6-1 7-5 in the Japan F3 round of 16 on hard. The upset overturned the form book — Woong Sun Jun came in leading the head-to-head 1–0, but David Martin had been the form player, winning 2 of their last 6 on hard. David Martin claimed a first win over Woong Sun Jun in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-04-17 | Japan F2 | SF | carpet | Woong Sun Jun | 6-3 6-2 |
Averages over each player's completed matches in the selected window (1 vs 14). 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. Small sample — read as indicative. About