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.
2017 World Snooker Championship 20, O'Sullivan attempted a 147 maximum break. He ran out of position after potting the 13th red and had to take the pink instead of the black and made a clearance of 146, which still ended up as the highest break of the championship. Barry Hawkins reached his fourth Crucible semifinal in five years, beating Stephen Maguire, the only qualifier to reach the quarterfinals, 13–9. The semifinals saw a repeat of the 2016 final, with Mark Selby playing Ding Junhui. Selby would defeat Ding 17–15. Selby would be ahead for most of the match, pulling away from Ding after the