It’s the first time that any player has compiled five tons in a best-of-11 frame match, although Ronnie O’Sullivan once made five in a best-of-nine. World number 50 O’Brien is through to the last 32 at the York Barbican, where he will face Stephen Maguire.
O’Brien’s centuries were 101, 100, 111, 111 and a 113 in the decider. Hawkins himself made runs of 74, 59, 95, 83 and 78 in a high quality contest.
“It’s got to be up there with the best matches I’ve ever played,” said Dublin’s 44-year-old O’Brien. “It’s just great to play the way I can against a strong opponent.”
Stuart Bingham was another top 16 player to fall as he went down 6-4 to China’s Yu Delu. World number two Bingham led 4-3, but Yu won the last three frames with top breaks of 66 and 70.
Ali Carter top scored with 80 in a 6-2 win over Robbie Williams while 2003 UK Champion Matthew Stevens won a Welsh derby against Michael White 6-4.