Head-to-Head
Overview
Qian Sun and Noritaka Koizumi have met 1 time so far, all in 2026. Noritaka Koizumi leads 1–0. Their first encounter was at the 2026 M15 Luan, won by Noritaka Koizumi.
By surface
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Qian Sun and Noritaka Koizumi have met 1 time so far, all in 2026. Noritaka Koizumi leads 1–0. Their first encounter was at the 2026 M15 Luan, won by Noritaka Koizumi.