Adrian Lewis threw the first nine-darter of the 2015 PDC World Championship on Tuesday, in his 4-3 loss to Raymond van Barneveld.
The Englishman previously threw a perfect leg on the Alexandra Palace stage in the 2011 final, in which he beat Gary Anderson, and he repeated the feat in the first set of his clash with Van Barneveld.
Despite the heroics, which could earn Lewis up to a £10,000 bonus pending more perfect legs in the tournament, he fell to a thrilling defeat.
Van Barneveld, the 2007 champion, trailed 1-0, 2-1 and 3-2 in sets - but battled hard to win the final two sets and advance to a final-eight clash with Stephen Bunting.
BDO world champion Bunting fended off a spirited resurgence from Michael Smith to win 4-2.
Bunting went three sets up, but Smith - who completed 170 and 161 checkouts in the contest - pulled the next two sets back to put pressure on.
But Bunting claimed the sixth set 3-1 to continue his solid form.
Phil Taylor, the 14-time winner of the PDC's illustrious event, survived a mighty challenge from Belgium's Kim Huybrechts to win 4-3.
Taylor, who revealed post-match that he used new darts in the last-16 battle, came from behind thrice in the match before winning the deciding set 3-0.
Next up for the 16-time world champion is Dutchman Vincent van der Voort, who was too good for Englishman Dean Winstanley.
Van der Voort won the first six legs of the contest on his way to a two-set lead, and staved off a Winstanley challenge to achieve just his second quarter-final appearance in London, and first since 2011.
Earlier, Scotland's Anderson averaged over 104 as he dispatched of Spanish qualifier Cristo Reyes 4-1.
Anderson's countryman Peter Wright will face him in the last eight, after the 2014 runner-up dispatched of England's Andy Hamilton 4-0.
Wright also had a ton-plus average - 102.6 - as he continued another deep run at the tournament.