Head-to-Head
Overview
John Sperle and Karol Filar have met 1 time so far, all in 2026. John Sperle leads 1–0. Their first encounter was at the 2026 M15 Budapest (R32), won by John Sperle.
By surface
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John Sperle and Karol Filar have met 1 time so far, all in 2026. John Sperle leads 1–0. Their first encounter was at the 2026 M15 Budapest (R32), won by John Sperle.