RYAN JOYCE punished James Wade for missing five match-darts to reach the quarter-finals of the William Hill World Championship.
Joyce continued his sensational debut run by adding Wade to his list of giant-killings, having already seen off seeded opponents Simon Whitlock and Alan Norris.
Joyce brilliantly took out 138 to win the first set 3-1 but checkouts of 126 and a set-winning 81 saw Wade restore parity.
Three-time semi-finalist Wade added a 120 finish as he took the third set 3-1 to move ahead in the match.
Joyce responded by finishing 123 on the way to a 3-0 success in set four but Wade then rattled off three consecutive legs to level the tie once again.
The sixth set went down to a fifth leg and Wade squandered five match darts before Joyce somehow found a severely obstructed double four to send the match into a deciding set.
Wade won the first leg on double five but Joyce levelled with a 110 finish and took the lead by landing double ten to break Wade's throw - and the World Championship debutant landed the match-winning double at the fifth attempt to move into the last eight.
Joyce - 87.69
Wade - 90.77
Joyce - 3
Wade - 6
Joyce - 138
Wade - 126
Joyce - 3
Wade - 2
Joyce - 15/50
Wade - 13/36