Defending champion Neil Robertson became the fourth player in snooker history to make 700 centuries on his way to beating Mark Joyce in the ManBetX Welsh Open.
The Australian won 4-2 in Cardiff and started impressively on Wednesday evening, with his 135 putting him in an elite group that includes Stephen Hendry, John Higgins and century leader Ronnie O'Sullivan.
The win over Joyce in the last-64 encounter took in-form Robertson's record in ranking play to 20 victories out of 21.
The 38-year-old won the Coral World Grand Prix in Cheltenham on Sunday, having already this year triumphed at the European Masters in Austria and finished runner-up at the German Masters.
Five-time Welsh Open champion John Higgins beat Ken Doherty 4-1, while four-time champion O'Sullivan will face Anthony Hamilton having beaten Stuart Carrington 4-2.