Kayla Day

Where the 1570.8 rating comes from

From 94 matches played between 22 August 2016 and 16 November 2026, 89 of them rated, 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.

94 matches, from the most recent to the first

beaten by Shuai Zhang 1–2
16/11/26 · WTA 500 2026 · Qualifying — First round · detail
−11.21582.0 → 1570.8
beaten by Maya Joint 1–2
16/11/26 · WTA 250 2026 · Qualifying — Qualifying competition · detail
−10.51592.5 → 1582.0
beat Ena Koike 2–0
16/11/26 · WTA 250 2026 · Qualifying — First round · detail
+6.51586.0 → 1592.5
beat Sofia Kenin 2–0
16/11/26 · WTA 250 2026 · First round · detail
+11.41574.5 → 1586.0
beaten by Antonia Ružić 0–1
16/11/26 · WTA 250 2026 · Second round · retirement · detail
±0.01574.5 → 1574.5
beaten by Liudmila Samsonova 1–2
14/09/26 · WTA 500 2026 · Second round · detail
−6.71581.3 → 1574.5
beat Elvina Kalieva 2–0
14/09/26 · WTA 500 2026 · First round · detail
+11.31570.0 → 1581.3
beaten by Shuai Zhang 1–2
12/08/26 · WTA 1000 2026 · First round · detail
−9.51579.5 → 1570.0
beat Yuan Yue 2–1
11/08/26 · WTA 1000 2026 · Qualifying — Qualifying competition · detail
+13.41566.0 → 1579.5
beat Taylah Preston 2–0
10/08/26 · WTA 1000 2026 · Qualifying — First round · detail
+12.21553.8 → 1566.0
beaten by Coco Gauff 0–2
06/08/26 · WTA 1000 2026 · Second round · detail
−1.61555.4 → 1553.8
beat Diane Parry 2–1
04/08/26 · WTA 1000 2026 · First round · detail
+16.11539.3 → 1555.4
beat Guo Hanyu 2–0
03/08/26 · WTA 1000 2026 · Qualifying — Qualifying competition · detail
+12.51526.8 → 1539.3
beaten by Madison Keys 1–2
29/06/26 · WTA Grand Slam 2026 · First round · detail
−2.21529.0 → 1526.8
beat Yuan Yue 2–0
30/03/26 · WTA 500 2026 · Qualifying — Qualifying competition · detail
+16.11512.9 → 1529.0
beat Haley Giavara 2–0
30/03/26 · WTA 500 2026 · Qualifying — First round · detail
+8.51504.3 → 1512.9
beaten by Paula Badosa Gibert 0–2
30/03/26 · WTA 500 2026 · First round · detail
−3.21507.5 → 1504.3
beaten by Iga Świątek 0–2
05/03/26 · WTA 1000 2026 · Second round · detail
−0.91508.4 → 1507.5
beat Francesca Jones 2–0
04/03/26 · WTA 1000 2026 · First round · detail
+14.91493.4 → 1508.4
03/03/26 · WTA 1000 2026 · Qualifying — Qualifying competition · detail
+12.11481.3 → 1493.4
02/03/26 · WTA 1000 2026 · Qualifying — First round · detail
+18.91462.4 → 1481.3
beaten by Madison Brengle 0–2
23/02/26 · WTA 250 2026 · Qualifying — First round · detail
−9.11471.6 → 1462.4
beaten by Aleksandra Krunic 1–2
09/09/24 · WTA 500 2024 · Qualifying — First round · detail
−8.41479.9 → 1471.6
beat Rebeka Masarova 2–1
05/08/24 · WTA 1000 2024 · Qualifying — First round · detail
+16.91463.0 → 1479.9
beaten by Moyuka Uchijima 1–2
05/08/24 · WTA 1000 2024 · Qualifying — Qualifying competition · detail
−10.71473.7 → 1463.0
beaten by Veronika Kudermetova 0–2
17/06/24 · WTA 500 2024 · Qualifying — Qualifying competition · detail
−4.11477.9 → 1473.7
beat Arina Rodionova 2–0
17/06/24 · WTA 500 2024 · Qualifying — First round · detail
+11.51466.4 → 1477.9
beaten by Heather Watson 1–2
10/06/24 · WTA 250 2024 · First round · detail
−8.01474.4 → 1466.4
beaten by Hailey Baptiste 1–2
27/05/24 · WTA Grand Slam 2024 · First round · detail
−7.11481.5 → 1474.4
beaten by Bai Zhuoxuan 0–2
20/05/24 · WTA 250 2024 · First round · detail
−12.31493.8 → 1481.5
beaten by Caroline Dolehide 1–2
01/04/24 · WTA 500 2024 · First round · detail
−9.21503.0 → 1493.8
beaten by Emiliana Arango 1–2
18/03/24 · WTA 1000 2024 · Qualifying — First round · detail
−11.51514.5 → 1503.0
beaten by Nadia Podoroska 0–2
07/03/24 · WTA 1000 2024 · Second round · detail
−9.51524.0 → 1514.5
beaten by Erika Andreeva 1–2
05/03/24 · WTA 1000 2024 · Qualifying — Qualifying competition · detail
−9.91533.9 → 1524.0
beat Alycia Parks 2–0
04/03/24 · WTA 1000 2024 · Qualifying — First round · detail
+12.51521.4 → 1533.9
beat Madison Sieg 2–0
26/02/24 · WTA 500 2024 · Qualifying — First round · detail
+11.11510.3 → 1521.4
beaten by Ann Li 0–2
26/02/24 · WTA 500 2024 · Qualifying — Qualifying competition · detail
−7.41517.7 → 1510.3
beaten by Viktoriya Tomova 0–2
15/01/24 · WTA Grand Slam 2024 · First round · detail
−11.41529.1 → 1517.7
beaten by Viktoriya Tomova 1–2
08/01/24 · WTA 250 2024 · Qualifying — First round · detail
−12.51541.6 → 1529.1
beaten by Yuan Yue 1–2
01/01/24 · WTA 250 2024 · First round · detail
−15.31556.9 → 1541.6
beaten by Marie Bouzková 0–2
09/10/23 · WTA 250 2023 · First round · detail
−5.01561.9 → 1556.9
beaten by Cristina Bucșa 1–2
02/10/23 · WTA 1000 2023 · Qualifying — First round · detail
−10.01571.9 → 1561.9
beaten by Veronika Kudermetova 0–2
25/09/23 · WTA 500 2023 · Second round · detail
−3.81575.7 → 1571.9
beat Moyuka Uchijima 2–0
25/09/23 · WTA 500 2023 · First round · detail
+8.71567.1 → 1575.7
11/09/23 · WTA 500 2023 · Qualifying — First round · detail
+9.11558.0 → 1567.1
beaten by Camila Osorio 1–2
11/09/23 · WTA 500 2023 · Qualifying — Qualifying competition · detail
−6.61564.6 → 1558.0
beaten by Sorana Cîrstea 0–2
28/08/23 · WTA Grand Slam 2023 · First round · detail
−5.81570.4 → 1564.6
beat Sachia Vickery 2–1
07/08/23 · WTA 1000 2023 · Qualifying — Qualifying competition · detail
+12.11558.4 → 1570.4
beat Louisa Chirico 2–0
07/08/23 · WTA 1000 2023 · Qualifying — First round · detail
+14.31544.1 → 1558.4
beaten by Marie Bouzková 0–2
07/08/23 · WTA 1000 2023 · First round · detail
−5.71549.8 → 1544.1

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.