Sebastien Grosjean crushed Carlos Moya 6-1 6-4 6-2 to reach the semi-finals of the Australian Open in Melbourne.
The Frenchman, playing in his first Grand Slam quarter-final, showed no signs of nerves.
Breaks in the fourth and sixth games put 16th seed Grosjean on his way to victory over the unseeded Spaniard.
Moya, runner-up in the event in 1997 and winner of the French championship the following year, was broken again in the ninth game of the second set and again early in the third.
The 22-year-old Grosjean, never seeded before in a Grand Slam and promoted this time only because of pre-tournament injuries to Mark Philippoussis, Thomas Enqvist and Alex Correjta, finished the match off in under 100 minutes.
He then had to wait to see whether it would be his fellow countryman Arnaud Clement - conqueror of Greg Rusedski in the previous round - or fifth seed Yefgeny Kafelnikov he plays on Friday.
Grosjean beat fourth seed Magnus Norman in the fourth round, a match which had a dramatic conclusion when Norman sportingly did not ask the Marseille player to retake a serve which the umpire called as a let.