Head-to-Head
Overview
Oscar Lien Johan and Calvin Mueller have met 1 time so far, all in 2026. Oscar Lien Johan leads 1–0. Their first encounter was at the 2026 M15 Saarlouis (R32), won by Oscar Lien Johan.
By surface
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Oscar Lien Johan and Calvin Mueller have met 1 time so far, all in 2026. Oscar Lien Johan leads 1–0. Their first encounter was at the 2026 M15 Saarlouis (R32), won by Oscar Lien Johan.