World champion Phil Harrison overcame a testing opening hurdle to reach the last 16 of the £25,000 Foster's World 8-Ball Pool Championships in Blackpool.
The Cambridgeshire window cleaner defeated Ireland's Shane O'Hara 8-5.
Top seed Harrison will now face Jack Whelan for a televised quarter-final place.
Whelan defeated qualifier Vinny Allen 8-4.
There was also a major scare for three time winner Gareth Potts.
The number two seed edged home 8-7 against former World Under 21 champion, Pat McCarron.
Former champion Mick Hill also reached the last 16 after an 8-4 win over Hitan Patel.
Jason Twist, one of a select group to have won two world crowns, enjoyed an even more emphatic victory.
The Devon veteran thrashed Malta's Clayton Attard 8-1.
Adam Davis is one of the season's form players, winning two of the three IPA Strachan Tout events.
The Stoke on Trent potter proved too strong for Ireland's Pat O'Leary 8-2.
Davis next meets dangerous qualifier James Croxton while Potts is likely to be in for another battle against Welsh favourite, Craig Marsh.
The current World EightBall Pool Competition is currently taking place at Imperial Hotel Blackpool until the 9th of July.
This article was taken from World Eightball Pool Federation.
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