Ding Junhui holds four-frame lead over Ronnie O'Sullivan

Ding Junhui produced a sparkling display at the Crucible to lead Ronnie O'Sullivan 10-6 in their Betfred World Championship quarter-final.

Every frame of the morning saw a break of 50 or more, Ding taking a 3-0 lead before O'Sullivan levelled the session at 4-4, but the Chinese player pulled ahead in the evening session.