Wales' Matthew Stevens proved too strong for Ulster's Mark Allen at the Roewe Shanghai Masters. The World Snooker Championship semi-finalist from Antrim failed to get his game going and lost 5-2. Mark Williams, another Welshman, gained a 5-3 win against Belfast's Joe Swail in the final match of the day. Ronnie O'Sullivan made a bright start to his Roewe Shanghai Masters campaign as he eliminated Graeme Dott without dropping a frame. The world number one finished with a break of 101 as he won 5-0. In the early session, Shaun Murphy made light work of Michael Holt, winning 5-1. He was joined in the second round by China's Ding Junhui - who pleased the home crowd by overcoming England's Stephen Lee 5-2, making a break of 132 in the second frame. Ali Carter finally held off a spirited challenge from Tian Pengfei to win 5-3, while Jamie Cope sneaked a 5-4 success over Joe Perry.