Rocket has angry exchange with referee at Crucible

Ronnie O'Sullivan was embroiled in an angry exchange with referee Olivier Marteel as he took a 5-3 lead in the opening session of the World Snooker Championship final against Judd Trump.

Marteel appeared to admonish O'Sullivan when the six-time champion returned to his seat after failing to get out of a snooker in the eighth frame, prompting O'Sullivan to jab his finger and respond that the official "saw nothing".

Trump won the final two frames of the session to reduce the arrears, before O'Sullivan left the arena without offering the usual handshake to Marteel.