Cameron Norrie was unable to turn his fortunes around on the British grass as he lost to huge-serving Milos Raonic in the first round at Queen's.
Canada's Raonic hit 47 aces - a record for the most in a three-set match - in a 6-7 (6-8) 6-3 7-6 (11-9) victory.
Norrie had two match points in the third-set tie-break but could not convert before Raonic took his third opportunity.
It is 28-year-old Norrie's second successive defeat on home soil after losing to 773rd-ranked qualifier Jack Pinnington-Jones in Nottingham earlier in June.
A difficult season has seen Norrie win 15 and lose 14 of his 29 matches.
He has dropped to 38th in the world as a result and was displaced as the British men's number one this week by Jack Draper.
Raonic reached the Wimbledon final in 2016, where he lost to Britain's Andy Murray, but the 33-year-old has had his career decimated by injuries in recent years.
This performance was a reminder of the devastating ability he possesses on the grass.
The regularity of his aces - and the speed of them, with the fastest hitting 145mph - was met with increasing awe by the London crowd.
A 144mph ace down the middle brought up a third match point for the Canadian which he took with a cross-court forehand winner.
Norrie had hung tough in the face of Raonic's arsenal and only faced four break points himself.
Missing a volley for a 3-1 lead in the tie-break looked like it could be costly and, although he recovered to level and earn match points, Raonic played the big points superbly to come through.
"It's a big part of my game. If I didn't have my serve my career would be very different," said Raonic, who is ranked 186th in the world having played just nine matches this season.