Sofia Costoulas

Where the 1523.9 rating comes from

From 11 matches played between 29 December 2025 and 21 September 2026, and from them alone. Every line below was written at computation time: nothing is recomputed to show this page.

How to read this

On the right: the change this match produced, then the value before → after. A line's arrival value is the next line's starting value, down to the starting rating given to every newcomer. A ±0.0 is a counted match that did not move the rating, a walkover for instance.

11 matches, from the most recent to the first

beaten by Tatiana Prozorova 1–2
21/09/26 · WTA 500 2026 · First round · detail
−10.31534.1 → 1523.9
beat Nao Hibino 2–1
20/07/26 · WTA 250 2026 · Qualifying — First round · detail
+25.61508.5 → 1534.1
beat Ayla Aksu 2–0
20/07/26 · WTA 250 2026 · Qualifying — Qualifying competition · detail
+18.31490.2 → 1508.5
beaten by Ayla Aksu 1–2
20/07/26 · WTA 250 2026 · First round · detail
−32.81523.0 → 1490.2
beaten by Tereza Valentová 0–2
13/07/26 · WTA 250 2026 · First round · detail
−15.81538.9 → 1523.0
beaten by Hanne Vandewinkel 1–2
30/03/26 · WTA 250 2026 · First round · detail
−29.81568.6 → 1538.9
beaten by Iva Jovic 0–2
03/01/26 · WTA 250 2026 · Quarterfinals · detail
−18.41587.1 → 1568.6
beat Kaitlin Quevedo 2–0
02/01/26 · WTA 250 2026 · Second round · detail
+24.61562.4 → 1587.1
beat Whitney Osuigwe 2–1
31/12/25 · WTA 250 2026 · First round · detail
+18.31544.1 → 1562.4
beat Veronika Erjavec 2–1
30/12/25 · WTA 250 2026 · Qualifying — Qualifying competition · detail
+21.71522.4 → 1544.1
beat Elyse Tse 2–0
29/12/25 · WTA 250 2026 · Qualifying — First round · detail
+22.41500.0 → 1522.4

Only the matches the source publishes appear; what is missing is listed. The source gives the day, not the hour: two matches on the same day are ordered by a reproducible rule, which is not necessarily the real order.