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
2016 World Snooker Championship the opening session of the other semifinal, Mark Selby took a 3–0 and 5–3 lead, but Marco Fu fought back to end the second session all-square at 8–8. Fu's tip separated from his cue in the 15th frame as he was chalking it. A ten-minute break was called while the tip was glued back on. The 24th frame, won by Selby to level at 12–12, lasted 76 minutes 11 seconds, becoming the longest frame ever played at the Crucible, breaking the previous record of 74 minutes 58 seconds set in the 2009 match between Stephen Maguire and Mark King. The