Neil Robertson said he was “really pleased” with how he fought back after coming from 2-0 down to beat Mark Williams 6-4 at the Guild Hall.
The win books Robertson a semi-final date against number two seed Judd Trump on Friday night.
The Aussie lost the opening two frames to reigning World Champion Williams but fought back to go 5-2 up, hitting breaks of 95 and 75 in the process.
Williams then reduced the deficit to 5-4, hitting a 57 break in the eighth frame.
But Robertson produced a brilliant match winning break of all reds, all blues to take the game 6-4.
Robertson will now face Trump, who came from 5-2 down on Wednesday night to beat Jack Lisowski 6-5.

When asked about whether he feared history could have repeated itself in his match, Robertson said:
“You’re aware of what happened obviously, but I guess Jack’s a lot more inexperienced and has got a little bit of a nasty habit this season of losing matches he shouldn’t lose.
“That’s probably just experience with him and I’m sure he mature and start learning from this.
“Myself, I’ve never really had that problem with getting over the line. Everyone was aware of the result but it never really entered my mind today.”
Snooker has made a return to the Guild Hall over the last few years following a ten year gap from 2004 to 2014 of the famous theatre not hosting the sport, but Robertson is another player who is a big fan of the popular venue.
“I enjoy the Guild Hall, it’s a very historic venue. Stephen Hendry won five of his UK Championships here.
“It was one of my first televised tournaments that I played in when we had the Grand Prix here (in 2004).
“It’s a wonderful venue to play in, one of the very best and a lot of the players are very happy that we’ve got a big tournament here.”