Head-to-Head
Overview
Hiromasa Koyama and Hayden Jones have met 1 time so far, all in 2026. Hayden Jones leads 1–0. Their first encounter was at the 2026 M15 Tokyo (R32), won by Hayden Jones.
By surface
- hard0 – 1
Hiromasa Koyama and Hayden Jones have met 1 time so far, all in 2026. Hayden Jones leads 1–0. Their first encounter was at the 2026 M15 Tokyo (R32), won by Hayden Jones.