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Sofia Costoulas
Right-Handed
Sofia Costoulas is a professional tennis player from Belgium, 21 years old, ranked No. 152 on the WTA singles rankings as of September 21, 2026. Career-high ranking: No. 134 (April 13, 2026). Costoulas has won 5 career singles titles from 13 finals (5 at WTA 125 / ITF). Most recent title: W75 Kofu 1 (2026), beating Ma 7-5, 6-3 in the final. In 2026 the record stands at 31-24 (3-4 at Grand Slam level, 6-4 at Tour level, 9-8 at WTA 125 level, 13-8 at ITF / Futures level). Last match: lost to Inoue 6-3, 6-7(3), 6-3 in the R1 at W50 Guiyang, September 8, 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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