Mark Selby with a shock 3–5 defeat to Andrew Pagett in the qualifying rounds of the 2013 Wuxi Classic. The tournament was the first to use a new format that required top-16 players to compete in qualifiers. In minor-ranking tournaments, Selby was runner-up in the Yixing Open, where he lost 1–4 to Joe Perry, and the Rotterdam Open, where he lost 3–4 to Mark Williams. He won the Antwerp Open, defeating Ronnie O'Sullivan 4–3 in the final. In December, in the seventh frame of his UK Championship semi-final against Ricky Walden, Selby compiled snooker's 100th officially recognised maximum break in professional competition.
Mark Selby Pengfei, Robert Milkins, Ali Carter, and home favourite Ding Junhui, but was defeated 8–10 by Judd Trump in the final. At the 2011 World Championship, Selby set the record for the most century breaks compiled in a world championship match when he made six in his second round tie with Stephen Hendry. It was also a record for a best-of-25 match and took Selby's century tally for the season to 54, setting a new record for the most centuries compiled in a season. Selby's 2011/2012 season began by winning the non-ranking Wuxi Classic with a 9–7 victory over Ali Carter.