Graeme Dott held off a resurgent comeback from defending champion Neil Robertson to advance to the quarter-finals of the UK Championship at the York Barbican.
The former world champion raced into a 5-0 lead, but Robertson clawed his way back into the contest with five breaks in excess of 50 - including two centuries - to send the match into a deciding frame.
However after missing a tricky brown while on a break of 15, Dott fired in a break of 56 to finally get over the winning line.
Robertson's loss ensures that Ding Junhui - who lost in the last 32 - will become world number one for the first time, making him the first Asian to hold the accolade.
Stuart Bingham will face Dott in the quarter-finals after thrashing an off-colour Ricky Walden 6-0 in the afternoon session.
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The recent International Champion never settled, missing a succession of easy balls, as Bingham capitalised on his opponents errors. Despite not dropping a frame, the Shanghai Masters winner was hardly in vintage form either, recording only two breaks above 50.
HIGGINS DUMPED OUT
Three-time champion John Higgins suffered a surprsing 6-5 by compatriot, and world number 38, Anthony McGill.
In an all-Scottish affair, McGill rallied to build a 4-1 lead after losing the opening frame. Higgins battled back as the match became scrappy, before finally drawing level at 5-5 with a run of 129.
Both had chances in the final frame, but once Higgins broke down for a second time, with a lead of just one point, McGill held his nerve to reach the quarter-finals of a ranking event for just the second time in his career.
McGill faces either five-time world champion Ronnie O'Sullivan, or Matthew Selt in the next round.
Mark Davis brought James Cahill's dream UK Championship run to an end with a 6-2 victory on Wednesday evening.
Cahill, who beat Mark King and Ding Junhui en route to the last 16, was competitive during the early stages, limiting Davis' lead to just 3-2.
The 42-year-old's experience showed from thereon, as he made breaks of 63 and 68 to win comfortably in the end. Davis will meet either Judd Trump or Rod Lawler in the last eight. His best run at the event came in 2012 when he reached the semi-finals.
O'SULLIVAN AND SELT TO CLASH
Ronnie O'Sullivan and Matthew Selt will do battle on Thursday evening as they look to set up a quarter-final showdown with Anthony McGill. Stephen Maguire plays surprise package, David Morris, in the evening session's other match.
In the afternoon's matches, Judd Trump takes on Rod Lawler whilst Ruhr Open champion Shaun Murphy plays Hong Kong's Marco Fu, in a repeat of the 2008 UK final, which the former won 10-9.