Ronnie O'Sullivan took advantage of a couple of Joe Perry errors to edge into the quarter-finals of the Masters.

The world number one fired in a century to level at 2-2 and cleared up to lead 3-2 before the duo traded centuries.

Perry took the next two to lead 5-4 but missed pinks in the last two frames and after a lengthy safety exchange in the decider, O'Sullivan clinched a 6-5 win.

Stephen Maguire came from 5-2 down to beat fellow Scotsman Graeme Dott 6-5 in the opening match at Wembley Arena.

Maguire rattled in a break of 68 in the deciding frame after Dott had gone in-off while attempting a safety shot.

It capped a remarkable turnaround for Maguire who notched a 114 break in the third to lead 2-1, but Dott hit back with a 106 as he took the next four.

However, Maguire kept his composure to win the deciding frame.

He told BBC Sport: "My head went down at 3-2. Graeme didn't miss a long pot until he was 5-2 up.

606: DEBATE My tip for the tournament (Maguire) is through! Not the highest-quality match but a good match nonetheless RB

"I was just so nervous for some reason. I'm not sure why as I had a tournament a few weeks back so it's not like I'm short of match practice.

"I don't play again until Thursday and I'm in two minds about whether to head up the road (to Scotland) or stay down.

"I'm just relieved really."

Ricky Walden defeated Mark King 6-2 in the wildcard match and will now meet defending champion Mark Selby in the first round on Monday.

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