Klaasen scraped through against Mansell missing eight match darts before surviving three from the in form Clonoe Cyclone. He then landed D5 to set up a match against Gerwyn Price tomorrow.
Thornton came from 5-2 down to force a decider but Taylor held his nerve to win 6-5 in a match with 2 ton plus finishes from the Bolton ace. He will face Michael van Gerwen tomorrow.
Click here to view the prize fund breakdown for the PDC European Tour.
Mickey Mansell (87.6) 5 (11) 6 (90.97) Jelle Klaasen
Robert Thornton (76.07) 5 (11) 6 (82.53) Scott Taylor
Per Laursen v Steve West
Paul Nicholson v Peter Jacques
Ricky Evans v Dennis Nilsson
Adrian Lewis v Ted Evetts
Brian Lokken v Cristo Reyes
Max Hopp v Dragutin Horvat