Couldn't find this player
This link may be missing its player ID, or the profile may have moved. Back to Players to Watch.
Rira Kosaka
Rira Kosaka is a professional tennis player from Japan, 18 years old, currently outside the WTA top 500. In 2026 the record stands at 15-14 (15-14 at ITF / Futures level). Last match: beat Arakawa 3-6, 6-3, 6-2 in the Q1 at W50 Nanao, September 21, 2026.
15-142026 win–loss
The Climb
From the Futures to the Slams
The milestones that mark a professional career, with the ranking at each step.
Call the climb
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
| Date | Tournament | Rd. | Opponent | Result |
|---|
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
| Level | Record |
|---|