Head-to-Head
Overview
E. Koike and M. Yamaguchi have met 1 time so far, all in 2026. E. Koike leads 1–0. Their first encounter was at the 2026 W100 Cary, NC, won by E. Koike.
By surface
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E. Koike and M. Yamaguchi have met 1 time so far, all in 2026. E. Koike leads 1–0. Their first encounter was at the 2026 W100 Cary, NC, won by E. Koike.