Ronnie O'Sullivan eased past Sheffield amateur Mitchell Travis in the first round of the Welsh Open in Newport.
The reigning world and Masters champion won 4-1 to set up a second-round clash with Barry Pinches, a 4-1 winner against Nigel Bond.
Defending champion Stephen Maguire lost the first frame to Elliot Slessor but recovered quickly to win 4-1.
Ali Carter, the 2009 champion, was in clinical form as he beat Andrew Norman 4-1 with a 115 break along the way.
But 2003 UK champion Matthew Stevens had to battle all the way against Adam Wicheard, the Welshman winning 4-3 with a 50 break in the decider - his third half-century of the match.
China's Ding Junhui made a 121 break in the first frame against Gary Wilson, completing a 4-2 win with runs of 57, 77 and 82.
Scott Donaldson, the hotly tipped youngster from Perth, claimed a notable scalp with a 4-2 win over world number 12 Robert Milkins.
Jimmy Robertson beat Belgian prospect Luca Brecel 4-2 and there were wins by the same scoreline for Gerard Greene, David Gilbert and Sam Baird against Li Yan, Duane Jones and Robbie Williams respectively.
Andrew Higginson beat Martin O'Donnell 4-1 including a break of 100 and Jamie Cope hammered Ryan Clark by the same scoreline, while Andrew Pagett inflicted the day's only whitewash on Marcus Campbell.
Mike Dunn beat Aditya Mehta 4-3 and Ian Burns edged out Yu De Lu, also in a decider.