Head-to-Head
Overview
Kawachi/ Sumizawa and Masabayashi/ Vithoontien have met 1 time so far, all in 2026. Kawachi/ Sumizawa leads 1–0. Their first encounter was at the 2026 M15 Tokyo 2 (R16), won by Kawachi/ Sumizawa.
By surface
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Kawachi/ Sumizawa and Masabayashi/ Vithoontien have met 1 time so far, all in 2026. Kawachi/ Sumizawa leads 1–0. Their first encounter was at the 2026 M15 Tokyo 2 (R16), won by Kawachi/ Sumizawa.