Head-to-Head
Overview
Kostyuk/ Stearns and Guo/ Mladenovic have met 1 time so far, all in 2026. Guo/ Mladenovic leads 1–0. Their first encounter was at the 2026 Cincinnati (R16), won by Guo/ Mladenovic.
By surface
- hard0 – 1
Kostyuk/ Stearns and Guo/ Mladenovic have met 1 time so far, all in 2026. Guo/ Mladenovic leads 1–0. Their first encounter was at the 2026 Cincinnati (R16), won by Guo/ Mladenovic.