Ding Junhui fired a warning to his World title rivals by trouncing two-time champion Mark Williams 13-3 at the Crucible.
Ding, who beat Judd Trump in the last round and is bidding to become the first Chinese player to lift the World Championship, will take on the winner of the clash of the Scots, John Higgins and Alan McManus.
"I just play my snooker - it doesn't matter who I play," said Ding, who had to come through the qualifiers to reach the Crucible and can put his feet up today having defeated Williams with a session to spare.
Higgins came from 3-1 down to secure a 5-3 overnight lead against McManus.
Higgins is in the quarter-finals of the £1.5million showpiece for the first time since he won his fourth world crown in 2011, and looks to be hitting form at the right moment. He has already won the Australian Goldfields Open and International Championship this season and is targeting his 29th ranking title.
Higgins took the opening frame with a break of 63 before 45-year-old McManus, the oldest Crucible quarter-finalist since Steve Davis in 2010, hit back to win the next three frames with runs of 114, 78 and 56.
The Wishaw cueman won a scrappy fifth frame then made important breaks of 51 and 75 to go 4-3 up.
Higgins also took the last of the session for a two-frame lead. They play to a finish today.
Marco Fu carved out a 7-1 lead over Barry Hawkins.
Hawkins played brilliant snooker to beat Ronnie O'Sullivan in the second round, closing out an epic 13-12 victory, but looked drained yesterday.
The Hong Kong ace, by contrast, was in a break-building rhythm.
World number 14 Fu dominated the first five frames, with Hawkins scoring a mere 31 points. Breaks of 73, 76 and 81 helped Fu go 5-0 ahead. Hawkins took the sixth frame by clearing from blue to black, but Fu took the next two with runs of 66, 50 and 57. They resume today.
Kyren Wilson, conqueror of Ulster's Mark Allen in the last round, trails 2014 champion Mark Selby 10-6.