Michael van Gerwen and Raymond van Barneveld secured places in the Premier League play-offs with wins in Manchester.
League leader Van Gerwen beat Dave Chisnall 7-4 for his ninth win of the season, taking his points tally to 20 and meaning he is guaranteed a top-four finish and with it a place at the O2 Arena on May 22 with three weeks of the regular-season remaining.
Van Gerwen was not at his best, trailing Chisnall 4-3 before reeling off four legs in a row to turn things round.
"I didn't play that well, I know I can do a lot better," he told Sky Sports.
"But on the night the most important thing is to win. Now I've qualified for the play-offs it gives me even more confidence and I can chill-out for my games in the next few weeks. I'll be there!"