Ronnie O'Sullivan eased into the second round of the Northern Ireland Open with a comfortable victory over David John.
The five-time world champion made two century breaks in a 4-1 win over his Welsh opponent.
John Higgins, who beat O'Sullivan in Saturday's Champion of Champions final, enjoyed an even easier ride as he beat Paul Davison 4-0 but world number 26 Ben Woollaston is out after he suffered a surprise 4-2 defeat to amateur Jordan Brown.
Dubliner Fergal O'Brien beat China's Tian Pengfei 4-2 and Kildare 20-year-old Josh Boileau recorded an impressive 4-3 win over world no 40 Mike Dunn.
Jimmy White, Joe Perry, Luca Brecel, Barry Hawkins and Michael White are also through.