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Calvin Mueller
Calvin Mueller is a professional tennis player from Germany, 26 years old, ranked No. 744 on the ATP singles rankings as of September 21, 2026. Career-high ranking: No. 740 (September 14, 2026). Mueller has won 1 career singles title from 2 finals (1 at ITF level). Most recent title: M15 Forbach 1 (2025), beating Zeuch 5-7, 7-6(6), 6-4 in the final. In 2026 the record stands at 15-14 (15-14 at ITF / Futures level). Last match: lost to Juszczak 6-4, 6-3 in the QF at M15 Szczawno, September 4, 2026.
The Climb
From the Futures to the Slams
The milestones that mark a professional career, with the ranking at each step.
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Say where this player will be, and by when. Graded from the weekly rankings; the record lives on My Slip.
Why we're watching
Recent results
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The last ten singles matches, from the results feed. Click a column header to sort.
Career record by surface
Ranking, recent weeks
Titles & finals
Win–loss by level · this season
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