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Sayaka Ishii
Right-Handed
Sayaka Ishii is a professional tennis player from Japan, 21 years old, ranked No. 739 on the WTA singles rankings as of September 21, 2026. Career-high ranking: No. 188 (March 17, 2025). Ishii has won 1 career singles title from 3 finals (1 at WTA 125 / ITF). Most recent title: W35 Osaka 1 (2024), beating Fung 6-1, 3-6, 6-3 in the final. In 2026 the record stands at 23-21 (0-1 at Grand Slam level, 0-3 at WTA 125 level, 23-17 at ITF / Futures level). Last match: beat Suzuki 6-0, 6-0 in the Q1 at W50 Nanao, September 21, 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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