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 second of the season after Robertson), and also the twelfth player to win the World and UK Championship double in their career. In winning the world title, Selby also retook the world number one spot. In the first ranking event of the season, the Wuxi Classic, Selby lost 3–5 to Liang Wenbo in the last 32. He won the minor-ranking Riga Open, defeating Mark Allen 4–3 in the final, but lost 5–6 to Allen in the semi-final of the ranking Shanghai Masters. He suffered a surprise early exit in the last 128 of the ranking International Championship when 19-year-old tour