Sara Errani

Where the 1578.4 rating comes from

From 756 matches played between 10 May 2004 and 7 May 2025, 734 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.

756 matches, from the most recent to the first

beaten by Naomi Osaka 0–2
07/05/25 · WTA 1000 2025 · First round · detail
−4.31582.7 → 1578.4
beaten by Maya Joint 1–2
21/04/25 · WTA 1000 2025 · Qualifying — First round · detail
−10.41593.1 → 1582.7
beaten by Veronika Kudermetova 0–2
14/04/25 · WTA 500 2025 · Qualifying — Qualifying competition · detail
−7.11600.2 → 1593.1
beat Nastasja Schunk 2–1
14/04/25 · WTA 500 2025 · Qualifying — First round · detail
+8.41591.8 → 1600.2
beaten by Magdalena Fręch 1–2
14/04/25 · WTA 500 2025 · First round · detail
−9.71601.5 → 1591.8
beaten by Maya Joint 0–2
17/03/25 · WTA 1000 2025 · Qualifying — First round · detail
−10.91612.4 → 1601.5
beaten by Cristina Bucșa 0–2
03/03/25 · WTA 1000 2025 · Qualifying — First round · detail
−11.31623.8 → 1612.4
beaten by Veronika Kudermetova 0–2
10/02/25 · WTA 1000 2025 · Qualifying — First round · detail
−8.21631.9 → 1623.8
beaten by Qinwen Zheng 0–2
11/11/24 · WTA Grand Slam 2024 · First round · detail
−2.61634.5 → 1631.9
beat Ma Yexin 2–1
14/10/24 · WTA 500 2024 · Qualifying — Qualifying competition · detail
+5.91628.6 → 1634.5
beat Gao Xinyu 2–0
14/10/24 · WTA 500 2024 · Qualifying — First round · detail
+6.21622.4 → 1628.6
beaten by Katie Boulter 0–2
14/10/24 · WTA 500 2024 · First round · detail
−8.21630.7 → 1622.4
beaten by Liang En-shuo 0–2
23/09/24 · WTA 1000 2024 · Qualifying — First round · detail
−15.71646.4 → 1630.7
beaten by Diana Shnaider 0–2
28/08/24 · WTA Grand Slam 2024 · Third round · detail
−6.31652.7 → 1646.4
27/08/24 · WTA Grand Slam 2024 · Second round · detail
+11.91640.8 → 1652.7
beat Cristina Bucșa 2–1
26/08/24 · WTA Grand Slam 2024 · First round · detail
+10.11630.7 → 1640.8
beaten by Wang Yafan 0–2
12/08/24 · WTA 1000 2024 · Qualifying — First round · detail
−13.31644.0 → 1630.7
beaten by Qinwen Zheng 0–2
15/07/24 · WTA 250 2024 · First round · detail
−5.01649.1 → 1644.0
beaten by Linda Nosková 0–2
01/07/24 · WTA Grand Slam 2024 · First round · detail
−7.91657.0 → 1649.1
beaten by Emma Navarro 0–2
28/05/24 · WTA Grand Slam 2024 · Second round · detail
−8.51665.6 → 1657.0
27/05/24 · WTA Grand Slam 2024 · First round · detail
+10.81654.8 → 1665.6
beaten by Elina Svitolina 0–2
09/05/24 · WTA 1000 2024 · Second round · detail
−6.31661.1 → 1654.8
beat Amanda Anisimova 2–1
08/05/24 · WTA 1000 2024 · First round · detail
+17.11644.0 → 1661.1
beaten by Beatriz Haddad Maia 0–2
25/04/24 · WTA 1000 2024 · Second round · detail
−9.11653.2 → 1644.0
24/04/24 · WTA 1000 2024 · First round · detail
+18.01635.2 → 1653.2
23/04/24 · WTA 1000 2024 · Qualifying — Qualifying competition · detail
+8.31626.9 → 1635.2
beat Julia Riera 2–1
22/04/24 · WTA 1000 2024 · Qualifying — First round · detail
+12.01615.0 → 1626.9
15/04/24 · WTA 500 2024 · Qualifying — First round · detail
+6.51608.5 → 1615.0
beat Anna Kalinskaya 2–1
15/04/24 · WTA 500 2024 · Qualifying — Qualifying competition · detail
+20.01588.5 → 1608.5
beaten by Jasmine Paolini 0–2
15/04/24 · WTA 500 2024 · First round · detail
−5.41593.9 → 1588.5
01/04/24 · WTA 250 2024 · First round · detail
+9.31584.6 → 1593.9
01/04/24 · WTA 250 2024 · Second round · detail
+16.31568.4 → 1584.6
beat Irina Maria Bara 2–1
01/04/24 · WTA 250 2024 · Quarterfinals · detail
+9.61558.8 → 1568.4
beaten by Camila Osorio 0–2
01/04/24 · WTA 250 2024 · Semifinals · detail
−7.51566.3 → 1558.8
beaten by Alexandra Eala 0–2
18/03/24 · WTA 1000 2024 · Qualifying — First round · detail
−12.21578.5 → 1566.3
beaten by Naomi Osaka 0–2
06/03/24 · WTA 1000 2024 · First round · detail
−3.41581.8 → 1578.5
beat Arina Rodionova 2–0
05/03/24 · WTA 1000 2024 · Qualifying — Qualifying competition · detail
+9.01572.8 → 1581.8
04/03/24 · WTA 1000 2024 · Qualifying — First round · detail
+13.01559.8 → 1572.8
beaten by Wang Xiyu 0–2
19/02/24 · WTA 1000 2024 · Qualifying — Qualifying competition · detail
−9.01568.8 → 1559.8
beat İpek Öz 2–0
19/02/24 · WTA 1000 2024 · Qualifying — First round · detail
+8.41560.4 → 1568.8
beat Tatjana Maria 2–0
05/02/24 · WTA 250 2024 · Second round · detail
+14.71545.7 → 1560.4
beaten by Karolina Plíšková 0–2
05/02/24 · WTA 250 2024 · Quarterfinals · detail
−5.41551.1 → 1545.7
beat Caty McNally 2–0
05/02/24 · WTA 250 2024 · First round · detail
+14.81536.3 → 1551.1
beat Ella Seidel 2–0
29/01/24 · WTA 500 2024 · Qualifying — Qualifying competition · detail
+10.31525.9 → 1536.3
beat Anna Bondár 2–1
29/01/24 · WTA 500 2024 · Qualifying — First round · detail
+15.11510.9 → 1525.9
beaten by Anastasia Potapova 0–2
29/01/24 · WTA 500 2024 · First round · detail
−4.61515.5 → 1510.9
beaten by Storm Hunter 0–2
15/01/24 · WTA Grand Slam 2024 · First round · detail
−12.41527.9 → 1515.5
beat Tamara Zidanšek 2–1
16/10/23 · WTA 250 2023 · First round · detail
+15.91512.0 → 1527.9
beaten by Lucia Bronzetti 0–2
16/10/23 · WTA 250 2023 · Second round · detail
−8.91520.9 → 1512.0
beaten by Nao Hibino 1–2
31/07/23 · WTA 250 2023 · First round · detail
−9.81530.7 → 1520.9

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.