Jonny Clayton became the first player to secure his spot in the Premier League play-offs after winning Night 13 in Glasgow.
It was Clayton's fourth win of the tournament and it extended his lead of Michael van Gerwen, who he beat in the final, to six points.
Clayton started the night with a tough match-up with James Wade, but he came through that to face Gary Anderson.
With the Flying Scotsman on home turf, Clayton needed to dig deep to book his place in the final, but he edged the contest 6-4.
The final was another tight affair with neither player giving anything away in the opening seven legs. However, when van Gerwen slipped up and missed a double 10, Clayton pounced to give himself the advantage.
That advantage held in the final leg, and the Welshman happily secured his spot in the play-offs.
"Well it is nice to see that Q (qualified) next to my name because to get to the top 4, that is what I wanted," Clayton said.
"I played well tonight, the crowd was fantastic, obviously against Gary they were against me but they were absolutely brilliant.
"It would be nice to finish top but it is the top four you want to be in but to finish top would be amazing.
"I seem to see Michael van Gerwen and Peter Wright every week but I love it and hopefully I keep on winning games and I will try my best."
As the Premier League moves to Sheffield next week for night 14, van Gerwen looks almost certain to join Clayton in the semi-finals.
James Wade and Peter Wright occupy the other two qualification spots for now, although Joe Cullen will fancy his chances of making a late surge to upset that order.