James Duckworth

Where the 1583.3 rating comes from

From 337 matches played between 11 January 2010 and 9 November 2026, 330 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.

337 matches, from the most recent to the first

beaten by Cameron Norrie 0–2
09/11/26 · ATP 250 2026 · First round · detail
−7.81591.1 → 1583.3
beaten by Miomir Kecmanović 1–2
02/11/26 · ATP 1000 2026 · Qualifying — First round · detail
−13.11604.2 → 1591.1
beaten by Aleksandar Kovacevic 0–2
26/10/26 · ATP 500 2026 · Qualifying — First round · detail
−14.61618.8 → 1604.2
beaten by Stefanos Tsitsipas 0–2
19/10/26 · ATP 250 2026 · Quarterfinals · detail
−6.11624.9 → 1618.8
19/10/26 · ATP 250 2026 · First round · detail
+11.31613.6 → 1624.9
beat Luciano Darderi 2–0
19/10/26 · ATP 250 2026 · Second round · detail
+16.41597.2 → 1613.6
beaten by Hubert Hurkacz 0–2
07/10/26 · ATP 1000 2026 · First round · detail
−5.11602.2 → 1597.2
beaten by Lorenzo Sonego 0–2
21/09/26 · ATP 250 2026 · First round · detail
−10.71612.9 → 1602.2
beaten by Wu Yibing 0–3
02/09/26 · ATP Grand Slam 2026 · Second round · detail
−11.31624.2 → 1612.9
beat Matteo Arnaldi 3–1
31/08/26 · ATP Grand Slam 2026 · First round · detail
+13.31611.0 → 1624.2
24/08/26 · ATP 250 2026 · First round · detail
+8.61602.4 → 1611.0
beat Mariano Navone 2–0
24/08/26 · ATP 250 2026 · Second round · detail
+15.51586.9 → 1602.4
beat Lorenzo Sonego 2–0
24/08/26 · ATP 250 2026 · Third round · detail
+15.01571.9 → 1586.9
24/08/26 · ATP 250 2026 · Quarterfinals · detail
+16.21555.8 → 1571.9
beaten by Arthur Fery 1–1
24/08/26 · ATP 250 2026 · Semifinals · retirement · detail
±0.01555.8 → 1555.8
beaten by Arthur Fery 1–2
15/08/26 · ATP 1000 2026 · Second round · detail
−10.51566.3 → 1555.8
beat J. J. Wolf 2–0
13/08/26 · ATP 1000 2026 · First round · detail
+13.61552.6 → 1566.3
beaten by Alex de Minaur 0–2
06/08/26 · ATP 1000 2026 · Second round · detail
−3.81556.4 → 1552.6
04/08/26 · ATP 1000 2026 · First round · detail
+13.31543.1 → 1556.4
beaten by Cameron Norrie 0–2
27/07/26 · ATP 250 2026 · Second round · detail
−6.71549.7 → 1543.1
beat Aidan Mayo 2–1
27/07/26 · ATP 250 2026 · First round · detail
+8.61541.2 → 1549.7
beaten by Flavio Cobolli 1–3
01/07/26 · ATP Grand Slam 2026 · Second round · detail
−4.51545.6 → 1541.2
29/06/26 · ATP Grand Slam 2026 · First round · detail
+16.91528.8 → 1545.6
beaten by Giles Hussey 0–2
22/06/26 · ATP 250 2026 · Qualifying — First round · detail
−12.51541.3 → 1528.8
beaten by Aleksandar Vukic 0–2
15/06/26 · ATP 500 2026 · Qualifying — First round · detail
−12.61553.9 → 1541.3
beaten by Jiří Lehečka 1–2
08/06/26 · ATP 250 2026 · Second round · detail
−3.71557.6 → 1553.9
08/06/26 · ATP 250 2026 · First round · detail
+11.31546.3 → 1557.6
beaten by Rafael Jódar 1–3
27/05/26 · ATP Grand Slam 2026 · Second round · detail
−5.31551.6 → 1546.3
beat Gabriel Diallo 2–0
25/05/26 · ATP Grand Slam 2026 · First round · retirement · detail
±0.01551.6 → 1551.6
beat Miguel Damas 2–1
18/05/26 · ATP 250 2026 · Qualifying — First round · detail
+9.81541.8 → 1551.6
beaten by Edas Butvilas 0–2
18/05/26 · ATP 250 2026 · Qualifying — Qualifying competition · detail
−11.71553.5 → 1541.8
beaten by Laslo Djere 1–2
18/05/26 · ATP 250 2026 · First round · detail
−10.71564.2 → 1553.5
beaten by Roberto Bautista Agut 0–2
18/03/26 · ATP 1000 2026 · First round · detail
−8.91573.1 → 1564.2
beaten by Dalibor Svrčina 0–2
04/03/26 · ATP 1000 2026 · First round · detail
−13.51586.6 → 1573.1
beaten by Dalibor Svrčina 0–2
23/02/26 · ATP 500 2026 · First round · detail
−15.31601.9 → 1586.6
beaten by Eliot Spizzirri 0–2
09/02/26 · ATP 500 2026 · First round · detail
−11.81613.7 → 1601.9
beaten by Jannik Sinner 0–3
21/01/26 · ATP Grand Slam 2026 · Second round · detail
−0.61614.3 → 1613.7
beat Dino Prižmić 3–2
19/01/26 · ATP Grand Slam 2026 · First round · detail
+12.11602.2 → 1614.3
beaten by Tomáš Macháč 0–2
12/01/26 · ATP 250 2026 · First round · detail
−6.61608.9 → 1602.2
05/01/26 · ATP 250 2026 · Qualifying — First round · detail
+10.21598.7 → 1608.9
beat Térence Atmane 2–0
05/01/26 · ATP 250 2026 · Qualifying — Qualifying competition · detail
+12.31586.4 → 1598.7
beaten by Alex Michelsen 1–2
05/01/26 · ATP 250 2026 · First round · detail
−9.61595.9 → 1586.4
beaten by Tristan Schoolkate 0–2
30/12/25 · ATP 250 2025 · Qualifying — First round · detail
−14.21610.2 → 1595.9
beat Saba Purtseladze 2–0
13/10/25 · ATP 250 2025 · Qualifying — First round · retirement · detail
±0.01610.2 → 1610.2
13/10/25 · ATP 250 2025 · Qualifying — Qualifying competition · detail
+8.71601.5 → 1610.2
beat Ugo Blanchet 2–0
13/10/25 · ATP 250 2025 · First round · detail
+10.11591.4 → 1601.5
beat Gabriel Diallo 2–1
13/10/25 · ATP 250 2025 · Second round · detail
+16.81574.6 → 1591.4
beat Flavio Cobolli 2–0
13/10/25 · ATP 250 2025 · Quarterfinals · detail
+18.71555.9 → 1574.6
beaten by Daniil Medvedev 1–2
13/10/25 · ATP 250 2025 · Semifinals · detail
−3.11559.0 → 1555.9
beaten by Gauthier Onclin 0–2
29/09/25 · ATP 1000 2025 · Qualifying — First round · detail
−14.71573.6 → 1559.0

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.