Luke Humphries trumped Michael Smith to continue his pursuit of the Mr Vegas Grand Slam of Darts title, as Gerwyn Price also progressed after defeating Ricky Evans in Friday's quarter-finals.
World number one Humphries continued his fine form in his 16-8 triumph over 2022 champion Smith, averaging just shy of 105 in the process.
Humphries started in typically imperious fashion, leading 4-0 after hitting all four of his attempts at double.
The 2023 champion extended his lead to 7-3 - averaging over 109 at this stage - before Smith rallied.
The St Helens star began his mid-game comeback with a ten-darter, missing double 12 for a nine-darter whilst Humphries simultaneously went six darts perfect - before rattling off another three legs to level at 7-7.
However, Humphries then went on a darting rampage, taking out a 138 checkout to begin a spell of dominance where the world number one won nine of the final ten legs.
Humphries closed out a relentless second-half performance with an 11-darter to secure his third semi-final appearance at the Grand Slam in four years.
"There's a lot more in the tank and I can do better than that," admitted Humphries, who has averaged over 104 in both of his knockout games so far.
"Since I slowed my throw down a little bit, I feel like I'm so much more in control, the first dart is more consistent and I believe I can get better.
"Throwing slower does help me. Every dart you throw needs to mean something, so I feel like I'm a better player than I've ever been.
"Gezzy is going to push me and will work hard, but if I perform like that, I will put him under pressure a lot."
Humphries will take on Price in the semi-finals, after the Welshman produced a stellar performance to see past Ricky Evans 16-9.
Price began in magnificent fashion, storming into a 4-0 lead before Evans reduced the deficit to 4-2.
The Welshman then defied a strong second session from Evans to recover his four-leg lead at 7-3, although Evans once again threatened a fightback.
However, after leading 7-5, Price did not have his throw broken for the remainder of the game, extending his lead to 14-9 with a 13-darter.
Three-time champion Price then closed out the game with a 12-dart leg and 101 finish to reach his fourth Grand Slam semi-final.
“I was edgy in that game a little bit, but I prefer that because it keeps me on my toes,” confessed Price, who has won the tournament on the three previous occasions he has made the last four.
“It's mad how everyone plays their best game against me! Twice Ricky played well in this tournament and it's twice against me.
“I'm here to win it. I'm not here just to take part. I haven't fired on all cylinders yet.
“When I’m in the semi-final, I need to play well if I’m going to win, and it’s going to be a battle no matter what.”
The quarter-finals continue on Saturday evening, as Luke Littler continues his defence of the Grand Slam with a mouth-watering clash against Josh Rock, whilst Lukas Wenig looks for revenge against Danny Noppert.
The 2025 Mr Vegas Grand Slam of Darts is being broadcast live on Sky Sports in the UK, through the PDC's worldwide broadcast partners including DAZN and Viaplay, and on PDCTV (excluding UK, Germany, Austria & Switzerland based subscribers).
Click here for match stats & results.
2025 Mr Vegas Grand Slam of Darts
Friday November 14
2x Quarter-Finals
Gerwyn Price 16-9 Ricky Evans
Luke Humphries 16-8 Michael Smith
Saturday November 15 (1900 GMT)
2x Quarter-Finals
Danny Noppert v Lukas Wenig
Luke Littler v Josh Rock