Earlier, Welsh fifth seed Jonny Clayton saw off the challenge of Swedish debutant Andreas Harrysson to set up a last-eight tie with England’s Ryan Searle.
Harrysson missed chances in the fifth set to take a 3-2 lead, while five of the six sets played went to a deciding leg.
“Every time I looked up, Andreas was hitting doubles,” said Clayton.
“It was tough. I didn’t play my best and had a lot of loose darts, but that’s what pressure does to you. Andreas kept me under pressure all the time.”
Clayton’s victory means he is provisionally up to fourth in the PDC world rankings and would qualify automatically for next year’s Premier League if he is still in that spot at the end of the tournament.
In Tuesday’s opening match, Poland’s Krzysztof Ratajski beat 25th seed Luke Woodhouse 4-2 to set up a quarter-final against defending champion Luke Littler.
Woodhouse missed double 12 for a nine-dart finish in the third set, which would have been the first perfect leg of the tournament and would have earned the Englishman an additional £60,000.