Mark Selby Open, losing 1–4. Selby won his first ranking title of the 2017/18 season by retaining the International Championship after surviving a fightback from Mark Allen, who trailed 3–8 and 7–9 in the final but the Englishman prevailed 10–7. As 2017 World Snooker Champion, Selby automatically qualified for the 2017 Champion of Champions. However, he lost in the quarter-finals to Luca Brecel by a scoreline of 4–6. At the 2017 Shanghai Masters, Selby crashed out to 2011 finalist Mark Williams in the quarter-finals 3–5. Selby's reign as the UK champion came to an end with a 3–6 defeat to Scott Donaldson
Mark Selby once again faced Higgins in the first round and this time caused a huge upset by defeating the reigning Grand Prix and Masters champion 10–4, before being eliminated in the next round by Mark Williams. In the 2007 World Championship, Selby beat Stephen Lee 10–7 in the first round, having won eight successive frames from being 5–0 behind. He then defeated former World Champion Peter Ebdon 13–8, with five centuries (including three-in-a-row) to reach the quarter-finals. In the quarter-final, he beat Ali Carter 13–12, from 11–8 up and 11–12 down, in a match that lasted well over nine hours. He