Clayton kept pace with Van Gerwen till 11-11, before Van Gerwen fired in back-to-back 11-dart legs. The world number one then extended his lead to 15-11.
Van Gerwen missed eight match-darts in the 27th leg to win the game and Clayton managed to win one more leg. The two-time world champion then claimed victory with a 66 checkout to defeat the Welshman.
The prize fund breakdown for this tournament can be found here. Click here for more information about the Grand Slam of Darts.
Friday November 16 (1900 GMT)
Dimitri Van den Bergh (94.28) 9-16 (98.58) Mensur Suljovic
Simon Whitlock (95.03) 15-16 (95.86) Gerwyn Price
Saturday November 17 (1900 GMT)
Michael Unterbuchner (88.52) 6-16 (100.48) Gary Anderson
Jonny Clayton (95.88) 12-16 (101.65) Michael van Gerwen
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