James Cahill vs Ronnie O'Sullivan
See also CueTracker
International Championship Qual (22-25 Sep 2014) 
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| Q Rd 1 |  |
James Cahill [91] | 3 | - | 6 | |
Ronnie O'Sullivan [4] |   | |||
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International Championship Qual (29 Sep - 1 Oct 2016)
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| Q Rd 1 | |
James Cahill [78] | 4 | - | 6 | |
Ronnie O'Sullivan [11] | | |||
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China Open Qual (24-27 Jan 2017)
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| Q Rd 1 | |
James Cahill [95] | 3 | - | 5 | |
Ronnie O'Sullivan [11] | | |||
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World Championship (20 Apr - 6 May 2019)
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| Rd 1 | |
James Cahill (a) | 10 | - | 8 | |
Ronnie O'Sullivan [2] |   This was O'Sullivan's first loss in round one of the World Championship since 2003 | |||
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Scottish Open (9-15 Dec 2019)
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| Rd 2 | |
James Cahill [112] | 0 | - | 4 | |
Ronnie O'Sullivan [3] | | |||
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Welsh Open Qual (15-20 Feb 2022)
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| Q Rd 1 | |
James Cahill (a) | 0 | - | 4 | |
Ronnie O'Sullivan [3] | | |||
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Cahill replaced Sam Craigie who withdrew. |
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