Beier Ko defeated Junri Namigata 6-3 6-4 in the Changwon 25K round of 16 on hard. The upset overturned the form book — Junri Namigata came in leading the head-to-head 1–0. Beier Ko claimed a first win over Junri Namigata in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-06-06 | Seoul 25K | R32 | hard | Junri Namigata | 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.