Roger Federer’s competitive preparation before Wimbledon ended in a three-set loss to Canada’s Felix Auger-Aliassime at the Halle Open in Germany.
Switzerland’s world number eight Federer, who turns 40 in August, lost 4-6 6-3 6-2 to Auger-Aliassime, 20.
After an encouraging start, Federer struggled to serve in the deciding set as Auger-Aliassime broke twice.
The 20-time Grand Slam champion is aiming for a ninth All England Club men’s singles title.
On Monday, Federer beat Belarusian Ilya Ivashka in straight sets – his first game since withdrawal from Roland-Garros to protect a knee injury.
But he found things much more difficult against Auger-Aliassime, 21st, who dominated on serve and came back well to keep Federer regularly under pressure.
The event was only the champion’s fourth tournament on 10 times since January 2020, requiring two surgeries to a knee injury.
He will next look to Wimbledon, which kicks off in southwest London on June 28.
Auger-Aliassime said Federer was his idol growing up, calling it “amazing” to win against him.
“It was a huge honor to play him before he retired and beating him is a moment I will always cherish,” said the Canadiens.
“I always thought he would have left when I got there because he was winning Grand Slam tournaments when I was five.
“I didn’t expect to play it. To be on the same side and to win is a huge honor.”