Andy Murray reached the Paris Masters last eight with a 6-2 6-2 win against 2003 US Open champion Andy Roddick.
The British number one powered through the first set in 31 minutes before dominating his American opponent again in the second to seal the victory.
For world number three Murray, it was a 27th win his last 28 appearances and extend his unbeaten run to 18 matches.
He will play fifth seed Tomas Berdych at 1300 GMT on Friday after the Czech overcame Janko Tipsarevic 7-5 6-4.
The only downside to Murray's win was a leg problem that forced him to call for the trainer early in the first set.
"I felt my hamstring, similar to last week, and I just wanted to get it checked out," said the 24-year-old.
"I'll have to monitor it. Everyone has niggles at this stage of the season and you have to deal with them. I felt it early on, it might have been to do with the early start. Maybe I didn't warm up as well as I normally would."
Murray set the tone when he broke Roddick's serve in the first game before holding for 2-0 and then producing a stunning backhand en route to another break for 5-2.
The first set was secured with a sensational winner and things went from bad to worse for Roddick when Murray immediately broke his serve at the start of the second.
Roddick vented his frustration by smashing his racquet and arguing with umpire Mohamed Lahyani, earning a code violation for racquet abuse, and Murray won the next two games for a 4-0 lead.
The 29-year-old from Texas managed to pick up a couple of games but Murray unleashed his sixth and seventh aces to seal an emphatic triumph.
Murray was delighted with the manner in which he dispatched Roddick, despite the 0930 GMT start time.
"He's been number one in world, a Grand Slam champion, one of the best players in the last 10 years and always difficult to play against," continued the world number three.
"I started the match really well and got up an early break. He's a player who can build pressure by serving well and goes after return games. But because of the good start I was able to dominate.
"The hardest thing about starting so early is that half an hour before the match I was having to get pasta and fish down me.
"But you just wake up a bit earlier - it's one of the things with tennis, you never know when you're going to play. I have had to get used to it the more years I've been on tour, but it was a bit early today."
Meanwhile, Novak Djokovic came from behind to beat fellow Serbian Viktor Troicki 4-6 6-3 6-1.
The world number one looked to be struggling with the shoulder injury that has troubled him of late but he came through to set up a quarter-final meeting with Jo-Wilfried Tsonga, who overcame Andreas Seppi 6-3 6-4.
"At this level, everybody is equal," said Djokovic. "I've known Viktor for a long time and there are no secrets.
"I went on court not too warmed up or focused and I felt a little pain in my shoulder. I'm not really worried because I know it's not an injury, just strong inflammation.
"Unfortunately I need couple of days to recover and I don't have that this week in Paris. I will have to find a way to recover and I'm sure I'll be fit for London."
Roger Federer defeated Richard Gasquet 6-2 6-4. Federer, the third seed, broke the home favourite in the opening service and secured another break when Gasquet double-faulted at 2-4 down, before clinching the set with a nonchalant volley.
After an early exchange of breaks in the second set, Federer broke again and went on to complete his victory with an inside-out forehand winner on his first match point.
David Ferrer beat Alexandr Dolgopolov 6-3 6-2 to book a quarter-final with American John Isner.
But another American, Mardy Fish, retired from his match with Juan Monaco while leading 1-6 7-6 (8-6) 1-2, on the same day Fish qualified for the ATP World Tour Finals for the first time.
The American will hope to recover in time for the season-ending tournament at London's O2 Arena, which starts on 20 November.
British pair Colin Fleming and Jamie Murray lost 6-4 6-3 to Rohan Bopanna and Aisam-ul-Haq Qureshi in the doubles.