Defending champion Luke Humphries beat Gerwyn Price to win his first night of the Premier League season, but the pair both sealed play-off spots in Birmingham.
Humphries, who was in his third successive night final, overcame the Welshman 6-4 after an impressive 6-0 win over Stephen Bunting and 6-3 comeback win over Luke Littler.
The 31-year-old was in imperious form, averaging 107 and 111, before another 100-plus average in the final.
It guarantees a place at finals night on 28 May for the third successive year and rounds off a remarkable few weeks for the world number two.
After week 10, Humphries sat seventh in the eight-player table and, before his run to the week 13 final, he was five points off fourth.
He is now guaranteed to finish at least fourth and goes into the final league phase night in Sheffield on 21 May equal on points with third-placed Price.
The pair join Littler and Jonny Clayton, who had secured their places after week 12 in Liverpool.
“It’s been a struggle this year,” Humphries told Sky Sports.
“I worked incredibly hard, I changed back to my old flights and it worked. I’m proud of myself.
“It’s easy when you’re winning, but it shows true grit to come from my position to then get through and win it tonight.
“I’m just incredibly proud of myself. Probably the most proud I’ve been in my life.”