The most gruelling day on the darting calendar kicks off this afternoon as eight players battle it out in a bid to reach tonight's Semi-Finals.
The tournament has provided countless dramatic moments and pure entertainment over the past three days and has been branded the best event since it began nine years ago.
More of the same can be expected over the course of two sessions on Sunday, starting with the Quarter-Finals in the afternoon.
The curtain raiser features last year's runner-up Wes Newton taking on the resurgent Robert Thornton, with both having prevailed from a host of gripping ties to reach this stage of the competition.
Newton has established himself as a solid performer in this event, reaching the last 32 every year since it began, a feat matched only by Phil Taylor.
He was involved in an epic battle with Belgium's Kim Huybrechts in the final match of the fifth round last night, one that went all the way to a deciding leg and saw Newton survive five missed match darts from his opponent and step in with double five to snatch victory.
Thornton has gone somewhat under the radar so far and is enjoying a fine run in this event after suffering a huge loss of form over the past 18 months which has seen him tumble down the rankings.
He has made board two his spiritual home so far, but will need to transfer the form that has seen him defeat the likes of Gary Anderson and Dennis Priestley onto the main stage if he is to send home The Warrior. The hopes of Scotland rest on The Thorn's shoulders.
The tie of the round follows as hotshot Dave Chisnall takes on Raymond van Barneveld, a man counting his lucky stars that he remains in the running after being let off the hook by Peter Wright.
Barney breezed past Jelle Klaasen and Andy Hamilton in the early rounds, but made hard work of his match against Wright, eventually punished his opponent for bursting 138 and grabbing victory in a last leg decider.
The Dutchman is determined his replicate his success in this event in 2006 and 2007 when he won the title, but knows he must raise his game against one of dart's current hottest properties in Chizzy.
The St Helens star is seemingly continuing his blistering ProTour form and bringing it to the main stage; he will be full of confidence after coasting past Simon Whitlock in the last round and remains on course for a final showdown with Phil Taylor.
Taylor is switching up the voltage himself as the tournament progresses, producing a magical 110 average in beating Ronnie Baxter yesterday; he looks to emphasise his status as the main to beat but faces a tough test in the form of Terry Jenkins in the first of a possible three matches for the 51-year-old.
Jenkins has gone about his business in admirable fashion so far and is another player in a rich vein of form on the circuit this season, but knows he must produce his very best and more if he is to derail the Power's title charge.
The final match of the session features two rank outsiders bidding to reach the Semi-Finals after prevailing through the various rounds from the outer boards.
For Ovens, victory would incredibly make it a hat-trick of UK Open Semi-Finals and 'The Heat' must feel lady luck is shining down on him after coming back from the brink in his last two matches.
The veteran thrower fought back to see off Brendan Dolan in the last 32 and looked resigned to defeat against Paul Nicholson, only for The Asset to blow ten match darts and allow him to steal victory.
Ironically named The Heat, Ovens is one of the coolest characters in the game and will not be fazed by the occasion, as opposed to his opponent who arguably faces the most important match of his career to date.
After a barren year, Caven has come good in this event, seeing off the likes of Alan Tabern, Mark Hylton and Joe Cullen with a magnificent 160 checkout yesterday.
He will be hoping to do something which has deserted him in his PDC career so far by putting in a fine showing on the big stage in a game which could go all the way.
The action gets underway at 1pm GMT, with all matches being streamed live over the best of 19 legs from the Reebok Stadium, Bolton.
UK Open Quarter-Finals Order of Play
Best of 19 legs
Wes Newton v Robert Thornton
Dave Chisnall v Raymond van Barneveld
Phil Taylor v Terry Jenkins
Denis Ovens v Jamie Caven
A £10 accumulator for Wes Newton, Dave Chisnall, Phil Taylor and Jamie Caven to win their matches pays £47 with Bet365