Ayumi Morita

Where the 1644.4 rating comes from

From 251 matches played between 3 October 2005 and 9 September 2019, 230 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.

251 matches, from the most recent to the first

beaten by Valeria Savinykh 1–1
09/09/19 · WTA 250 2019 · Qualifying — First round · retirement · detail
±0.01644.4 → 1644.4
beaten by Patricia Maria Tig 0–1
20/02/17 · WTA 1000 2017 · Qualifying — First round · retirement · detail
±0.01644.4 → 1644.4
beat Zhang Kailin 2–0
30/01/17 · WTA 250 2017 · Qualifying — First round · detail
+9.31635.1 → 1644.4
beaten by Ons Jabeur 0–1
30/01/17 · WTA 250 2017 · Qualifying — Qualifying competition · retirement · detail
±0.01635.1 → 1635.1
beaten by Francesca Schiavone 0–2
02/01/17 · WTA 500 2017 · Qualifying — First round · retirement · detail
±0.01635.1 → 1635.1
30/12/14 · WTA 250 2014 · First round · detail
+19.21615.9 → 1635.1
beaten by Kurumi Nara 0–2
30/12/14 · WTA 250 2014 · Second round · detail
−11.51627.5 → 1615.9
beaten by Melinda Czink 1–2
14/07/14 · WTA 250 2014 · Qualifying — First round · detail
−15.81643.2 → 1627.5
beaten by Lyudmyla Kichenok 0–2
14/04/14 · WTA 250 2014 · First round · detail
−19.41662.6 → 1643.2
beat Monica Niculescu 2–1
31/03/14 · WTA 250 2014 · First round · detail
+13.41649.2 → 1662.6
beaten by Magdalena Rybáriková 0–1
31/03/14 · WTA 250 2014 · Second round · retirement · detail
±0.01649.2 → 1649.2
beaten by Jelena Janković 0–2
14/01/14 · WTA Grand Slam 2014 · Second round · detail
−5.31654.5 → 1649.2
beat Nadiia Kichenok 2–0
13/01/14 · WTA Grand Slam 2014 · First round · detail
+8.81645.7 → 1654.5
beaten by Tsvetana Pironkova 0–2
06/01/14 · WTA 500 2014 · Qualifying — First round · retirement · detail
±0.01645.7 → 1645.7
beat Yung Jan Chan 2–0
31/12/13 · WTA 250 2013 · First round · detail
+8.31637.4 → 1645.7
beaten by Peng Shuai 0–2
31/12/13 · WTA 250 2013 · Second round · detail
−10.11647.5 → 1637.4
beaten by Luksika Kumkhum 0–2
07/10/13 · WTA 250 2013 · First round · detail
−14.41661.9 → 1647.5
beat Laura Robson 2–0
23/09/13 · WTA 1000 2013 · First round · detail
+13.21648.7 → 1661.9
beaten by Jelena Janković 0–2
23/09/13 · WTA 1000 2013 · Second round · detail
−5.81654.5 → 1648.7
beat Petra Cetkovská 2–1
19/08/13 · WTA 500 2013 · Qualifying — First round · detail
+13.61640.9 → 1654.5
19/08/13 · WTA 500 2013 · Qualifying — Qualifying competition · detail
+8.31632.7 → 1640.9
19/08/13 · WTA 500 2013 · Qualifying — Second round · detail
+11.41621.3 → 1632.7
beaten by Elena Vesnina 0–1
19/08/13 · WTA 500 2013 · First round · retirement · detail
±0.01621.3 → 1621.3
beaten by Alison Riske-Amritraj 0–2
12/08/13 · WTA 1000 2013 · Qualifying — First round · detail
−13.11634.4 → 1621.3
beaten by Petra Martić 1–2
05/08/13 · WTA 1000 2013 · Qualifying — Qualifying competition · detail
−13.61648.0 → 1634.4
beat Maria Sanchez 2–1
05/08/13 · WTA 1000 2013 · Qualifying — First round · detail
+9.01639.0 → 1648.0
beaten by Varvara Lepchenko 0–2
05/08/13 · WTA 1000 2013 · First round · detail
−10.71649.7 → 1639.0
beaten by Laura Robson 1–2
29/07/13 · WTA 500 2013 · First round · detail
−12.01661.7 → 1649.7
beaten by Sorana Cîrstea 0–2
22/07/13 · WTA 500 2013 · First round · detail
−11.21672.9 → 1661.7
beaten by Marina Erakovic 1–2
24/06/13 · WTA Grand Slam 2013 · First round · detail
−14.31687.3 → 1672.9
beaten by Sofia Arvidsson 1–2
17/06/13 · WTA 250 2013 · First round · detail
−15.01702.2 → 1687.3
beaten by Alison van Uytvanck 0–2
10/06/13 · WTA 250 2013 · First round · detail
−18.91721.1 → 1702.2
beaten by Yulia Putintseva 0–2
27/05/13 · WTA Grand Slam 2013 · First round · detail
−16.51737.6 → 1721.1
beaten by Victoria Azarenka 0–2
13/05/13 · WTA 1000 2013 · Third round · retirement · detail
±0.01737.6 → 1737.6
13/05/13 · WTA 1000 2013 · Second round · detail
+12.91724.8 → 1737.6
beat Sorana Cîrstea 2–0
13/05/13 · WTA 1000 2013 · First round · detail
+11.51713.3 → 1724.8
beaten by Sorana Cîrstea 0–1
06/05/13 · WTA 1000 2013 · First round · retirement · detail
±0.01713.3 → 1713.3
29/04/13 · WTA 250 2013 · Second round · detail
+13.31700.0 → 1713.3
beat Laura Robson 2–0
29/04/13 · WTA 250 2013 · First round · detail
+8.81691.2 → 1700.0
beaten by Kaia Kanepi 0–2
29/04/13 · WTA 250 2013 · Quarterfinals · detail
−8.61699.8 → 1691.2
beat Jana Čepelová 2–0
01/04/13 · WTA 250 2013 · First round · detail
+10.21689.6 → 1699.8
01/04/13 · WTA 250 2013 · Second round · detail
+9.51680.1 → 1689.6
beaten by Angelique Kerber 0–2
01/04/13 · WTA 250 2013 · Quarterfinals · detail
−6.11686.2 → 1680.1
beaten by Serena Williams 0–2
22/03/13 · WTA 1000 2013 · Third round · detail
−1.41687.7 → 1686.2
beat Yanina Wickmayer 2–1
21/03/13 · WTA 1000 2013 · Second round · detail
+11.81675.9 → 1687.7
beat Heather Watson 2–1
20/03/13 · WTA 1000 2013 · First round · detail
+12.51663.4 → 1675.9
beaten by Lesia Tsurenko 0–2
06/03/13 · WTA 1000 2013 · First round · detail
−15.41678.8 → 1663.4
beat Nudnida Luangnam 2–0
25/02/13 · WTA 250 2013 · Second round · detail
+6.81672.0 → 1678.8
beat Luksika Kumkhum 2–1
25/02/13 · WTA 250 2013 · Quarterfinals · detail
+9.81662.2 → 1672.0
beaten by Karolina Plíšková 0–2
25/02/13 · WTA 250 2013 · Semifinals · detail
−17.11679.3 → 1662.2

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.