Mark Selby insists he will retire from snooker if his form doesn’t improve after the upcoming World Championship. The four-time world champion exited the Tour Championship on Tuesday, losing to Gary Wilson in what he described as ‘one of the worst games’ he’s ever played. Selby has been unable to hit his usual heights this season and has now threatened to hang up his cue for good. The 40-year-old did thrash Ronnie O’Sullivan 6-0 at the Players Championship less than six weeks ago, ending the Rocket’s 16-match winning run at the time. But he has not been able to build on that performance and wa…
