2021 Northern Ireland Open

[4] Mark Allen made a maximum break in his held over qualifying match against Si Jiahui.

[5] The defending champion was Judd Trump, who defeated Ronnie O'Sullivan in the 2018, 2019 and 2020 finals by a scoreline of 9–7 each time.

Higgins moved 8–6 ahead in the evening session, but Allen won the last three frames for a 9–8 victory.

[11][12] The defending champion was Judd Trump, who defeated Ronnie O'Sullivan in the 2018, 2019 and 2020 finals by a scoreline of 9–7 each time.

[21][22][23] An incident took place in the players lounge after the Peter Lines v Xiao Guodong match.

The incident was in relation to perceived inaccuracies in ball placement by the referee after a foul and a miss was called during a frame of their match.

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The event took place at the Waterfront Hall in Belfast.