Scott Donaldson won the battle of the quarter final debutants as he cruised to a 5-0 success over Chinese sensation Zhou Yuelong.
World number 77 Donaldson made the ideal start in the battle of the first-time ranking event quarter-finalists, as a break of 62 saw him take the opening frame.
He then stole a 2-0 lead on the black by clearing from the last red after Zhou wasted a very good opportunity to level things up, before taking a scrappy third on the brown.
The match was quickly running away from 19-year-old Chinese prodigy, who had dropped just two frames all week but was struggling to rise to the occasion on the TV table, and his opponent moved to the brink of a place in the semi-finals after eventually snatching a lengthy fourth frame on the pink.
No second invitation was needed for the 22-year-old, who won another close frame after the interval to ease through.
Judd Trump edged through to the Semi-Finals of the Welsh Open after defeating Barry Hawkins 5-4 on the final black.
Trump led 3-1 before being pegged back to trail 4-3 against a resilient Hawkins, but held his nerve to force a tense and nail-biting decider, in which he pounced on a missed yellow from his opponent by clearing to the black to squeeze into the Last Four by the skin of his teeth.
Stuart Bingham fended off a spirited Stuart Carrington fightback to seal his place in the Welsh Open Semi-Finals with a 5-3 victory.
Bingham looked to be in for a short night’s work as he raced into a 4-0 lead, only for Carrington to peg back with three consecutive frames after the interval.
The world number two, though, held his nerve to edge a marathon eighth frame and remain on course for a maiden Welsh Open crown.
Bingham will face Gloucester’s Milkins in Saturday’s Semi-Finals after the world number 32 dispatched Norway’s Kurt Maflin 5-2 at the Motorpoint Arena.
It was Maflin who took the opening frame with a break of 59, before Milkins hit back with a quick-fire 71 to level.
A break of 54 helped Milkins into a 2-1 lead, and after Maflin had produced a 57 in frame four, ‘The Milk Man’ overturned it with a superb 63 clearance to extend his lead.
Maflin pegged back after the restart, but only for Milkins to reel off the next two frames in quick succession to reach his fifth career ranking Semi-Final.