Dong Ju Kim defeated Keisuke Saitoh 6-1 6-2 in the M25 Daegu 1 round of 32 on hard. The upset overturned the form book — Keisuke Saitoh came in ranked #684, leading the head-to-head 1–0. Dong Ju Kim claimed a first win over Keisuke Saitoh in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-11-26 | M15 Gimcheon 2 | R32 | hard | Keisuke Saitoh | 6-7(6) 6-4 7-6(7) |
Averages over each player's completed matches in the selected window (2 vs 17). 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