Ryan Day vs Ronnie O'Sullivan

World Championship (15 Apr - 1 May 2006)
Rd 2		Ryan Day	10	-	13	Ronnie O'Sullivan
Rd 2	140 by O'Sullivan.
Northern Ireland Trophy (13-20 Aug 2006)
QF		Ryan Day	1	-	5	Ronnie O'Sullivan
PTC 4 (14-16 Aug 2010)
Rd 1		Ryan Day [11]	0	-	4	Ronnie O'Sullivan [2]
Welsh Open (14-20 Feb 2011)
Rd 1		Ryan Day [25]	4	-	2	Ronnie O'Sullivan [9]
China Open (28 Mar - 3 Apr 2011)
Rd 1		Ryan Day [20]	5	-	2	Ronnie O'Sullivan [10]
Championship League - Group 1 (4-5 Jan 2016)
Grp		Ryan Day	2	-	3	Ronnie O'Sullivan
Masters (13-20 Jan 2019)
QF		Ryan Day [13]	3	-	6	Ronnie O'Sullivan [4]	A half century in each frame (two in the fourth frame)
English Open (12-18 Oct 2020)
Rd 2		Ryan Day [37]	1	-	4	Ronnie O'Sullivan [2]

Ryan Day vs Ronnie O'Sullivan 2023/2024 2022/2023 2021/2022 2020/2021 2019/2020 2018/2019 2017/2018 2016/2017 2015/2016 2014/2015 2013/2014 2012/2013 2011/2012 2010/2011 2009/2010 2008/2009 2007/2008 2006/2007 2005/2006 2004/2005 2003/2004 2002/2003 2001/2002 2000/2001 All available