Luke Humphries moved into the quarter finals of the Boyle Sports World Grand Prix with a 3-1 win over Krzysztof Ratajski, as Stephen Bunting crashed out in Leicester.
Humphries - the 2023 champion and last year's runner-up at the Mattioli Arena - posted a 95.58 average and fired six maximums but was visibly frustrated at various points of a topsy-turvy contest.
The world No 1 needed a final-leg decider to open a two-set advantage and lost the next set to Ratajski, before Humphries burst into life by firing two ton-plus finishes to close out victory and build on his impressive record in the double-start event.
Humphries now faces a last-eight meeting on Friday with Scotland's Cameron Menzies, who beat former world champion Rob Cross 3-1 earlier in the evening, while fourth seed Bunting a