Mark J Williams vs Fergal O'Brien

1999/2000
World Championship (15 Apr - 1 May 2000)
QF		Mark J Williams (a)	13	-	5	Fergal O'Brien (a)
2000/2001
Masters (4-11 Feb 2001)
Rd 1		Mark J Williams (a)	5	-	6	Fergal O'Brien (a)
2005/2006
Grand Prix (8-16 Oct 2005)
Rd 1		Mark J Williams	3	-	5	Fergal O'Brien
2006/2007
Malta Cup (28 Jan - 4 Feb 2007)
Rd 1		Mark J Williams	4	-	5	Fergal O'Brien
2009/2010
Welsh Open (25-31 Jan 2010)
Rd 1		Mark J Williams	5	-	2	Fergal O'Brien
2014/2015
Championship League - Group 7 (9-10 Feb 2015)
Grp		Mark J Williams	3	-	2	Fergal O'Brien
World Seniors (2-3 Mar 2015)
Final		Mark J Williams	2	-	1	Fergal O'Brien
Final	30-41, 87-4 (74), 94-0 Williams had a 30 in the first frame with the balls placed difficultly but O'Brien stole the frame with a great clearance. Williams didn't give O'Brien any chances in frame 2 and made it 1-1. Williams had a 47 in the decider but missed the yellow ball and was lucky not to leave anything. Williams later got in again and won the frame and the match. This was his first World Seniors title. He also had the highest break with a 142.
2016/2017
German Masters Qual (6-9 Dec 2016)
Q Rd 1		Mark J Williams [15]	5	-	3	Fergal O'Brien [43]
2017/2018
German Masters (31 Jan - 4 Feb 2018)
Rd 1		Mark J Williams [9]	5	-	3	Fergal O'Brien [43]