The 13-time World Champion will now face Fleetwood's Wes Newton in the last 16 on Saturday evening as he bid to collect a third UK Open title and wrestle the trophy from Raymond van Barneveld's grip.
The Dutchman won his place in round five with a hard-fought 9-7 win over plucky Irishman Jason Barry, and he now meets Andy Hamilton, who defeated Chris Mason 9-6.
Vincent van der Voort, the 2007 runner-up, edged out Colin Osborne 9-8 in a classic battle and will now face former Lakeside champion and his travelling partner Jelle Klaasen in the last 16.
World Champion John Part's reward for a gritty 9-6 defeat of world number five Terry Jenkins is a date with Wayne Jones.
The final two Holsten Qualifiers, Robert Thornton and Scott Waites, saw their hopes ended by Alan Tabern and Ronnie Baxter respectively, while Stoke newcomer Nigel Birch lost 9-3 to Klaasen.
Northern Ireland's Brendan Dolan, who came from 8-6 down to knock out Adrian Lewis in a deciding leg, will take on Chris Thompson, a solicitor's clerk from York, as the pair bid for their first major quarter-final.
Mark Dudbridge, who pipped Peter Manley 9-7, meets Gary Mawson, while Yeovil's resurgent Simon Whatley takes on Tabern.
Baxter will meet world number three James Wade, who defeated Steve Brown 9-5 in the fourth round.
Blue Square UK Open
Fourth Round
Phil Taylor 9-1 Jamie Harvey
Ronnie Baxter 9-6 Scott Waites
Raymond van Barneveld 9-7 Jason Barry
Mark Dudbridge 9-7 Peter Manley
Vincent van der Voort 9-8 Colin Osborne
John Part 9-6 Terry Jenkins
James Wade 9-5 Steve Brown
Andy Hamilton 9-6 Chris Mason
Jelle Klaasen 9-3 Nigel Birch
Alan Tabern 9-6 Robert Thornton
Wes Newton 9-7 Mark Walsh
Gary Mawson 9-4 Mark Lawrence
Wayne Jones 9-2 Barrie Bates
Brendan Dolan 9-8 Adrian Lewis
Chris Thompson 9-5 Steve Maish
Simon
Blue Square UK Open - Round 4