Mark Selby says he has no World Championship expectations amid mental health battle

World championships begin Saturday at the Crucible in Sheffield

Current champion Mark Selby during the media day at The Crucible, Sheffield. Picture: Zac Goodwin/PA 

Mark Selby says winning a fifth world snooker title at the Crucible this year would rank as the greatest achievement of his career in light of his ongoing mental health battle.

The 38-year-old, who gets the defence of his title under way against Jamie Jones at the Crucible on Saturday, withdrew from the last two tournaments in Turkey and Gibraltar and gave serious consideration to also pulling out of the Sheffield showpiece.