OSullivan secures Grand Prix win

The 33-year-old, who won the season-opening Shanghai Masters, rarely hit his straps, a 126 break aside, but still had too much for the Scotsman.

And he looked immediately to his match against another Scot, Higgins, saying: "I will have to raise my game."

Another former world champion Mark Williams also secured his progress.

The 34-year-old Welshman never gave Englishman Stuart Bingham a look-in with a 5-0 demolition at Kelvin Hall, Glasgow.

Williams, who is building up his form after breaking his wrist earlier this year, will now face seven-time world champion Stephen Hendry.

World number two Stephen Maguire suffered a slight scare in his game with Nigel Bond, who held a 3-1 lead at the mid-match interval.

But the Scot came out after the break and took the next four frames to wrap up victory.

In the final round one match, Mark King came from 3-1 to beat Ricky Walden in a dramatic final frame.

Walden looked certain to win when he opened up a big enough lead to leave King needing three snookers.

But incredibly, he got them and then potted the pink before holding his nerve to sink a tricky black to win frame and match.

Last 16 draw:
Robert Milkins (Eng) v Mark King (Eng)
Ronnie O'Sullivan (Eng) v John Higgins (Sco)
Jamie Cope (Eng) v Mark Allen (NI)
Mark Williams (Wal) v Stephen Hendry (Sco)
Peter Ebdon (Eng) v Mark Davis (Eng)
Joe Perry (Eng) v Barry Pinches (Eng)
Stephen Maguire (Sco) v Ding Junhui (Chn)
Neil Robertson (Aus) v Ken Doherty (Ire)