Selby slips to first round defeat and O'Sullivan could follow in Crucible shocks

Mark Selby finally cracked at the Crucible as the defending champion lost in the first round - and Ronnie OSullivan could follow him out of the tournament on Sunday.

A stunning opening day of the Betfred World Championship saw defending champion Selby bundled out 10-4 by veteran Joe Perry, while OSullivan was unusually subdued as he fell 6-3 behind against Stephen Maguire.