Ronnie O'Sullivan cruised to a 6-1 victory over Robert Milkins to reach the quarter-finals at the Masters.

The world champion raced into a 5-0 lead but slipped up in frame six and allowed Milkins to avoid the whitewash.

Four-time Masters winner O'Sullivan responded by winning frame seven to seal victory.

Earlier, Shaun Murphy beat Ding Junhui 6-4 in a match that was delayed because of a power cut at Alexandra Palace in London.

Murphy was made to work harder for his victory over Ding and battle back from 2-0 and 4-2 down to set up a meeting with Marco Fu in the last eight.

China's Ding, who won the Masters title in 2011, took a 2-0 lead with breaks of 99 and 84 but Murphy was able to make it 2-2 at the interval.

After restoring his two-frame lead, Ding lost his way and his opponent took the next four frames to go through.

The 26-year-old looked favourite to go through but missed the chance to go 5-2 up when he led frame seven and never recovered.

England's Murphy took advantage by winning frames seven and eight before taking the lead for the first time in the match and going on to seal victory.