Head-to-Head
Overview
Delaney/ Vithoontien and Koizumi/ Taka have met 1 time so far, all in 2026. Koizumi/ Taka leads 1–0. Their first encounter was at the 2026 M15 Karuizawa (R16), won by Koizumi/ Taka.
By surface
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Delaney/ Vithoontien and Koizumi/ Taka have met 1 time so far, all in 2026. Koizumi/ Taka leads 1–0. Their first encounter was at the 2026 M15 Karuizawa (R16), won by Koizumi/ Taka.