British number one Tim Henman trailed off to a disappointing 6-4 6-4 quarter-final defeat to Sweden's Thomas Johansson at Queen's.
Henman struggled to find any rhythm on centre court
In an ominous sign for his Wimbledon chances, Henman looked well short of his grass-court best.
Henman failed to settle in the opening set, losing his serve twice and allowing Johansson to seal the set.
The second set followed a similar pattern with an early break of serve sealing Henman's fate.
Johansson, who defeated 18-year-old Brit Andy Murray on Thursday, always held the upper hand with a composed display.
"It was a different game," Johansson told BBC Sport.
"Tim was playing very aggressively, but the key was that I was returning very well.
"I like playing against serve and volley guys because I can take advantage of my returns and I also had a high percentage of first serves which keeps Tim from the net."
The Swede will face Ivo Karlovic, who beat Lleyton Hewitt, in the semi-finals.
Meanwhile, Henman insisted he learned a "valuable lesson" from his final-eight loss.
"I was disappointed with my performance, I never really gave myself an opportunity to put some pressure on him," the British number one said.
"Losing serve early in both sets is not where you want to be playing from.
"I have not done a very good job of being as decisive with my game plan on grass as other surfaces.
"I have options but don't use them as well on grass as I do on other surfaces."