World number three Gerwyn Price crashed out of the PDC World Matchplay as he suffered a shock first-round loss to Dutchman Danny Noppert.
Price was defeated 10-7 by Noppert, who registered five 180s en route to victory.
The 29-year-old, playing his second World Matchplay tournament after debuting last year, said on pdc.tv: "It is a big win, I'm a really happy man.
"He didn't play his best game, and it wasn't my best game but I'm really happy to win. I believe that I can beat everyone if I play at my best level."
Noppert's compatriot Vincent Van Der Voort also advanced into round two after he defeated Dave Chisnall 10-6 – ending a nine-year wait for a win in the competition.
Chisnall, ranked 10th in the world, was 5-4 up before his opponent turned things around, and Van Der Voort said: "I haven't felt this good for 10 to 15 years – the break has given me four months sleeping in my own bed and even though I still have some back pain it's a lot better."
Former finalist Adrian Lewis booked his place in the last 16 as the two-time world champion beat Steve Beaton 11-9.
Monday's action at the Marshall Arena in Milton Keynes also saw Daryl Gurney see off Ricky Evans 10-5 and Joe Cullen get past Ian White 13-12.
