Former world champion Dennis Priestley beat Alex Roy 13-8 to set up a showdown with Phil Taylor in the World Matchplay quarter-finals in Blackpool.
Taylor beat Priestley in last year's World Matchplay
The 56-year-old edged 3-2 ahead at the first break and took a six-leg lead but missed several doubles for victory as Roy cut his deficit to four.
Priestley eventually nailed double 10 to clinch his victory.
Ronnie Baxter beat Mark Walsh 13-9, while number eight seed Kevin Painter lost 13-9 to James Wade.
The 23-year-old, who has achieved two nine-darters this year, was never behind in the contest, getting out of the blocks quickly and opening up an 8-4 lead by taking out double top twice to finish the leg.
I was losing strength - I'm absolutely drained
Painter, a world championship finalist back in 2004, was clearly unimpressed and words appeared to be exchanged.
However, Wade remained calm and he closed out the match with double 10, finishing with a three-dart average of 91.84.
Priestley, who lost an epic second-round encounter against Taylor 12 months ago, said he would have to raise his game.
"The finishing line was getting further away," said Priestley. "I was losing strength - I'm absolutely drained.
"I made the start I wanted and I built on it, playing some decent darts, but there was the odd slack dart and you can't afford that."
Chris Mason also went through with a 13-7 win over fellow Englishman Steve Maish, despite not feeling very well.
Mason, who now faces Wade for a place in the semis, revealed afterwards that he almost pulled out before the game started.
He said: "I don't feel very well, I haven't been right all week. I don't know if it's the heat or I've picked up a bug, I'm just not myself."
Number five seed Wayne Mardle came through a tough contest with Lionel Sams before winning 13-10.
Dutchman Roland Scholten, the 2004 UK Open champion, reached the last eight for the first time with a 13-8 victory over Andy Jenkins.