Head-to-Head
Overview
Sofia Costoulas and Z. Bai have met 1 time so far, all in 2026. Z. Bai leads 1–0. Their first encounter was at the 2026 W75 Tianjin (China) (QF), won by Z. Bai.
By surface
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Sofia Costoulas and Z. Bai have met 1 time so far, all in 2026. Z. Bai leads 1–0. Their first encounter was at the 2026 W75 Tianjin (China) (QF), won by Z. Bai.