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 won the WEPF World Eight-ball Championship, beating Darren Appleton 11–7 in the final at Blackpool. On 2 February 2015, Selby played in the 2015 Chinese Pool World Championship , but lost to Darren Appleton 19–21 in the final. Selby is a fan of Leicester City, whom he has supported since childhood. His 2014 World Championship victory came on the same day as City celebrated their promotion to the Premier League with an open-top bus parade, while his 2016 World Championship victory came on 2 May 2016, which he won just 11 minutes after the team sealed their first Premier League