A ruthless Judd Trump produced three centuries in five frames as he took command of his World Championship quarter-final against Stephen Maguire in Sheffield.
Trump began with a clearance of 131 and added breaks of 67, 106, 78 and 101 to race into a 5-0 lead against a shell-shocked Maguire, who potted only seven balls and accrued a total of 24 points in the first five frames.
After winning the last six frames in a row to beat Ding Junhui in round two, Trump extended his unbeaten run to 12 by clearing the remaining colours when Maguire missed a tough brown to the yellow pocket in frame six.
Maguire, who had survived final-frame deciders in both the first and second rounds, finally got on the scoreboard in the next but missed another crucial brown in frame eight and Trump made the most of his chance to secure a 7-1 overnight lead.
The second session gets under way on Wednesday afternoon and Trump needs six more frames to reach the semi-finals with a session to spare.
Gary Wilson had earlier reeled off five frames in succession to gain the upper hand against Ali Carter, while Kyren Wilson and David Gilbert were locked together at 4-4 after the opening session of their quarter-final.
A total clearance of 135 had helped Carter race into a 3-0 lead and extended his streak of frames won to nine, the two-time Crucible runner-up having taken six in a row to beat Zhou Yuelong 13-9 on Monday. However, Gary Wilson stopped the rot with a break of 109 in the final frame before the mid-session interval and carried on where he left off after the break with contributions of 86, 134 and 55 to move 5-3 ahead.
Such breaks were largely absent in the day’s second quarter-final, with Kyren Wilson managing a highest break of 46 in the first eight frames against Gilbert. Kyren Wilson, who had produced centuries in the last two frames to beat Barry Hawkins 13-11 in round two, somehow scrapped his way into a 4-3 lead before Gilbert, who had earlier made breaks of 68 and 60, saved the best until last with a 109 clearance to level at 4-4.
Both matches were to resume at 7pm on Tuesday before playing to a finish on Wednesday.