Head-to-Head
Overview
S. Y. Choi and R. Kosaka have met 1 time so far, all in 2026. S. Y. Choi leads 1–0. Their first encounter was at the 2026 W15 Luan 4 (R32), won by S. Y. Choi.
By surface
- hard1 – 0
S. Y. Choi and R. Kosaka have met 1 time so far, all in 2026. S. Y. Choi leads 1–0. Their first encounter was at the 2026 W15 Luan 4 (R32), won by S. Y. Choi.