Shuichi Sekiguchi defeated Ji Sung Nam 6-4 6-0 in the Vietnam F2 round of 16 on hard. The result followed the form book — Shuichi Sekiguchi came in leading the head-to-head 2–0. Shuichi Sekiguchi extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-08-12 | China F7 | SF | hard | Shuichi Sekiguchi | 5-7 6-1 6-4 |
| 2013-05-27 | Korea F4 | SF | hard | Shuichi Sekiguchi | 6-3 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.