King came through defeating Raymond van Barneveld with a 99.5 average, four 180's and 71% on the doubles against a below par Barney who averaged just 86.
This meant a 10-4 win for 'The King' as he performed well throughout the match keeping to a consistent level which could bring him a good run this weekend.
Also through is
John Part, 'Darth Maple' who hasn't appeared on a televised tournament for some time has won for the fourth time today. He defeated David Evans who accounted for Benito van de Pas 10-2. Part averaged 92 to end a great day.
Click here for the 2018
UK Open Prize Fund breakdown.
Third Round - Best of 19 legs Main Stage
Rob Cross 10-8 Nathan Aspinall
Mervyn King 10-4 Raymond v Barneveld
Jeffrey de Zwaan v Michael van Gerwen
Robert Rickwood v Gary Anderson
Board Three
Jason Lowe 10-3 David Airey
John Part 10-2 David Evans
David Pallett v Robert Thornton
Ricky Evans v Luke Humphries
Kyle Anderson v Vincent van der Voort
Board Four
Jermaine Wattimena 10-8 Steve Beaton
Robert Owen 10-2 Jamie Lewis
Kim Huybrechts v Gabriel Clemens
Steve West v Darryl Pilgrim
Joe Cullen v Keegan Brown
Board Five
Krzysztof Ratajski 10-7 Darren Webster
James Wade 10-6 Simon Stevenson
Peter Wright v Nathan Rafferty
Chris Dobey v Harry Ward
Michael Rasztovits v Corey Cadby
Board Six
Matthew Edgar 10-4 John Henderson
Paul Hogan 10-6 Paul Nicholson
Kirk Shepherd v Michael Smith
Ian White v Simon Whitlock
Board Seven
Daryl Gurney 10-9 Jelle Klaasen
Martin Schindler 10-7 Ryan Harrington
Adrian Lewis v Dirk van Duijvenbode
Alex Roy v Gerwyn Price
Board Eight
Stephen Bunting 10-3 Justin Pipe
Ryan Meikle 10-6 Dave Chisnall
Jonny Clayton v Michael Barnard
Dave Prins v Ron Meulenkamp