Canadian Vasek Pospisil was midway through the second round at the National Bank Open before falling to American Tommy Paul in three sets on Monday.
The 24-year-old qualifier took the game 6-7 (5), 6-2, 6-3 in two hours 21 minutes.
Meanwhile, Leylah Fernández de Laval, Que., Was overthrown in Montreal in the afternoon session by Britain’s Harriet Dart.
Dart defeated Fernandez 7-5, 7-6 (4) to set a second-round date with second-seeded Canadian Bianca Andreescu who is the defending champion on the women’s side.
Pospisil, ranked 61st in the world, started slow when the 56th-ranked American broke it to open the match before the Canadian landed a long shot and fell behind 2-0.
However, the 31-year-old Pospisil overcame his rocky start and rallied with two aces in his next service game _ seven in the first set _ and finally broke Paul’s serve for the first time to make it 4-4.
The Vancouver native took his first lead at 5-4 and was consistent enough the rest of the way to win the tiebreaker and take the set in just over an hour.
After a seven-minute break between sets, Pospisil found himself in a similar situation starting the second after failing to hold serve, landing a long forehand to land on a 2-0 hole.
He was able to break Paul’s next serve only to return it, and he seemed to have cramps as Paul held serve to go up 4-1.
Pospisil, in the tournament as a wild card, finished with four double faults and broke three times on his way to lose the set in 35 minutes.
Pospisil spent time between the second and third sets with a fan under his jersey in an apparent attempt to cool off from the heat. He also met with medical staff in the third as he trailed 2-1, but continued to overcome what could have been making him sick as the crowd cheered him on with each serve.
Paul remained determined not to let Pospisil gain momentum, and broke the Canadian one last time to go up 5-3 while maintaining serve throughout the match.
Pospisil battled three break points but couldn’t avoid elimination as Canada’s most decorated Olympian Penny Oleksiak watched from the crowd in Toronto.
Next up for Paul is 10th seed Roberto Bautista Agut of Spain, who has a first-round break.
Tennis Canada is allowing 5,000 fans this year for each of the day and night sessions on Center Court in Montreal, and 4,500 per session in Toronto.
Rebecca Marino from Vancouver was scheduled to play later Monday.
In the men’s tournament, Marin Cilic of Croatia fired 13 aces in a 6-2, 4-6, 6-3 victory over Spaniard Albert Ramos-Viñolas, while Ugo Humbert of France beat Italian Lorenzo Sonego 6-3 , 6-4. .
Italian Fabio Fognini defeated German Jan-Lennard Struff in three sets, while Australian qualifier James Duckworth defeated American Taylor Fritz in straight sets.
Qualifier Brayden Schnur of Pickering, Ontario, the first Canadian in main draw action, lost 6-3, 6-2 to South African Lloyd Harris.
In doubles action, Montreal’s Felix Auger-Aliassime and Laval’s Alexis Galarneau, Que., Fell 6-4, 7-6 (6) against Russians Karen Khachanov and Andrey Rublev.
“To be honest, I thought we played a good game,” Auger-Aliassime said. “You know, they played well in the first set. We made little mistakes.
“Then in the second set it was really unfortunate. We missed some crazy shots in the tiebreaker that we shouldn’t have taken, but that’s right. It happens.”
Auger-Aliassime will play her first singles match on Wednesday after getting a goodbye in the first round.