Mark Selby of both the Masters and Welsh Open to Ronnie O'Sullivan, but won the Gdynia Open with a 4–1 victory over Martin Gould. Before the World Championship Selby withdrew from the PTC Finals and China Open due to personal reasons. He beat Robert Milkins 10–6, Sam Baird 13–11 and Kyren Wilson 13–8 to face Marco Fu in the semi-finals. Selby drew level at 12–12 thanks to winning a 76-minute frame, the longest in Crucible history and went on to win 17–15 with an excellent snooker on the brown in the final frame. He took a 6–0 lead over Ding Junhui in
Mark Selby rookie Oliver Lines came from 0–4 behind to defeat him 6–4. In the invitational Champion of Champions tournament, he reached the quarter-finals, but lost 1–6 against Judd Trump. He suffered another early exit at the UK Championship when he lost 4–6 to David Morris in the last 64. Playing Shaun Murphy in the first round of the Masters, Selby fell 1–5 behind before recovering to 5–5, but lost the match 5–6 on the deciding frame. It was the first time that Selby lost in a deciding frame at the Masters, having won the previous 11 deciding frames. At the German