Judd Trump won four frames in a row to beat Stuart Bingham 6-3 and secure a quarter-final tie against Ronnie O'Sullivan on Thursday.
Bingham went 2-1 up in the best of eleven match but Trump levelled with a 107 break in the fourth frame.
Despite Bingham then taking a 3-2 lead, Trump took control in a run of four frames which included a 121 break in the seventh frame.
"I'll have to improve probably 50% if I want to beat Ronnie," admitted Trump.
"I felt relaxed and I felt after the first frame that I've got a lead and I thought I could run away with it, but I just kept giving him chances.
"I cannot give Ronnie those chances I was giving Stuart.
"The first round can be the hardest round. You want to get it out of the way, no matter how you do it."
Despite his two centuries the 22-year-old from Bristol was prone to errors that Australian Open champion Bingham was quick to capitalise on.
World number eight Trump looked at ease as he compiled a confident 87 in the opener, but made just 19 at the start of the second before a hasty blue paved the way for Bingham to hit a 69 and pull level.
Bingham prevailed in a scrappy third by hitting breaks of 24 and 25 in a close tussle before an emphatic 107 in the next improved Trump's mood.
The pair exchanged frames again as Basildon potter Bingham re-established his lead at 3-2.
Trump responded with gritty breaks of 25 and 29 to level before a break of 121 moved him ahead for the first time since the opening frame.
A 37 at the start of the eighth frame put Trump in charge but a superb long red triggered a run of 32 from Bingham before a missed pink let his opponent back in.
Leading 52-49 with the colours remaining, Trump was given half a chance on a long yellow after a period of cat-and-mouse and duly fired home before slotting in the remaining colours for a 5-3 lead.
Bingham hit breaks of 24 and 26 in response to Trump's 50 in the next to leave the frame delicately poised.
The players slugged it out for several shots before Bingham finally opened the door for Trump, who smashed in the green and the remaining colours to take the victory.