Jun Woong-sun

Where the 1380.4 rating comes from

From 18 matches played between 8 January 2007 and 12 October 2015, 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.

18 matches, from the most recent to the first

beaten by Pierre-Hugues Herbert 0–2
12/10/15 · ATP 1000 2015 · Qualifying — First round · detail
−3.81384.2 → 1380.4
beaten by Mischa Zverev 0–2
28/09/15 · ATP 250 2015 · Qualifying — First round · detail
−3.71387.9 → 1384.2
beaten by Thanasi Kokkinakis 0–2
29/09/14 · ATP 500 2014 · Qualifying — First round · detail
−7.21395.1 → 1387.9
beaten by Alejandro Falla 1–2
07/10/13 · ATP 1000 2013 · Qualifying — First round · detail
−6.41401.5 → 1395.1
beaten by Santiago Giraldo 0–2
23/09/13 · ATP 250 2013 · Qualifying — Second round · detail
−5.51407.0 → 1401.5
23/09/13 · ATP 250 2013 · Qualifying — First round · detail
+15.61391.4 → 1407.0
beaten by Treat Conrad Huey 0–2
24/09/12 · ATP 250 2012 · Qualifying — Second round · detail
−8.71400.1 → 1391.4
beaten by Michael Yani 0–2
12/10/09 · ATP 1000 2009 · Qualifying — First round · detail
−13.71413.8 → 1400.1
beaten by Jesse Levine 1–2
23/02/09 · ATP 250 2009 · Qualifying — First round · detail
−21.91435.7 → 1413.8
beaten by Ramón Delgado 0–2
09/02/09 · ATP 250 2009 · Qualifying — Second round · detail
−19.11454.8 → 1435.7
beat Lester Cook 2–0
09/02/09 · ATP 250 2009 · Qualifying — First round · detail
+27.51427.3 → 1454.8
beaten by Jérémy Chardy 1–2
12/01/09 · ATP 250 2009 · Qualifying — First round · detail
−18.61445.9 → 1427.3
beaten by Philipp Kohlschreiber 0–2
28/07/08 · ATP 1000 2008 · Second round · detail
−7.51453.4 → 1445.9
beaten by James Blake 0–2
14/07/08 · ATP 250 2008 · Second round · detail
−7.21460.6 → 1453.4
beat Chris Guccione 2–0
14/07/08 · ATP 250 2008 · First round · detail
+28.51432.1 → 1460.6
beaten by Donald Young 1–2
07/07/08 · ATP 250 2008 · First round · detail
−31.91464.0 → 1432.1
beaten by Pablo Cuevas 0–2
19/05/08 · ATP 250 2008 · First round · detail
−24.21488.2 → 1464.0
beaten by Dominik Hrbatý 0–2
08/01/07 · ATP 250 2007 · First round · detail
−11.81500.0 → 1488.2

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.