Ronnie O'Sullivan has been given a bye into the semi-finals of the Welsh Open after last-eight opponent Ali Carter fell ill.
The two players were due to meet at Celtic Manor in Newport on Friday afternoon before Carter's withdrawal.
World Snooker Tour tweeted that Carter's absence from the quarter-final match was "not Covid-19 related".
O'Sullivan, 45, who is this week looking to emulate John Higgins' five Welsh Open titles, will now face either Mark Williams in the last four. Williams defeated Tom Ford 5-4 in his quarter-final.
Defending champion Shaun Murphy has been knocked out of the tournament after he suffered a 5-4 defeat to Stephen Maguire.
Scot Maguire, who won the event in 2013, recorded a break of 133 in the deciding frame to secure his semi-final