Maguire looked to be in fine form
Stephen Maguire went close to a 147 break on his way to wrapping up victory over Anthony Hamilton at The Crucible.
The Scot resumed 8-1 up after a superb first session on Wednesday, but Hamilton was in no mood to buckle as a 102 break helped him back to 8-3.
However, Maguire hit back with a break of 112 - missing a tough 15th red - and then sealed the match aided by a 63.
Meanwhile, defending champion John Higgins secured a 5-3 lead over Ryan Day in the final match of the day.
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Maguire finished off Hamilton in the 13th frame
The Scot had threatened to race away with the second-round clash when he found his rhythm early on to take the first four frames with breaks of 96, 53, 84 and 79.
However, Welshman Day then won three of the next four to trail by just two going into Friday's second session in the best-of-25 match.
Elsewhere, Peter Ebdon edged to a 5-3 lead over Mark King in a typically tight, drawn out contest.
King got things going in impressive fashion with an 81 break in the opener, but it was not a sign of things to come as the match degenerated into a hard-fought affair.
A 59 break helped Ebdon level but despite four huge slices of luck, the former Crucible champion found himself behind again at 2-1 when King cleared with a 25 in impressive fashion.
The breaks were coming but often at a snail's pace, and a run of 51 saw King lead for the third time with the match at 3-2 - only for Ebdon to reply again with a patient 79.
Ebdon led for the first time in the match when he took a long, scrappy seventh frame 68-36, and the former champion made it 5-3 with a break of 84 in the next.
Maguire was furious with himself after missing out on a maximum break, when he left himself too tough a 15th red to the baulk corner pocket.
I think I broke a tile in the toilet. My hand just 'slipped' and I heard a crack and didn't look back
Maguire after missing out on a 147 break
"I was just gutted with myself that I never went full out for position on the last red," he said. "I was scared if I got into the white too much I don't even get a shot at the red because it only went in the green pocket.
"I just got none of the white and left myself a red I would have potted if it wasn't for a maximum, but I just twitched.
"I think I broke a tile in the toilet (in the dressing room following the miss). My hand just 'slipped' and I heard a crack and didn't look back."