Hometown hero Eugenie Bouchard beat Emiliana Arango 6-4 2-6 6-2 in the first round of the Canadian Open in Montreal on Monday, a win that delayed the former world No 5's retirement.
Bouchard announced earlier this month she would walk away from the sport after the tournament but added a condition to that plan in the wake of her thrilling victory in front of a packed crowd.
"If I win this tournament, I will not retire," she said in an on-court interview.
Playing in only her second singles match of the year, Bouchard blasted a forehand winner to take the first set but Colombian Arango turned the tables in the second set amid a cascade of unforced errors from her opponent.
However, Bouchard broke for a 3-1 lead in the decider and hammered a swinging volley to extend the advantage to 4-1.
The 31-year-old wildcard put her hands on her head and then her heart after securing the victory to set up a second round meeting with 17th seed Belinda Bencic of Switzerland.
Briton Emma Raducanu beat her good friend Elena-Gabriela Ruse of Romania 6-2 6-4 and will next meet 32nd seed Peyton Stearns.
"It's very difficult to play someone who you are close to," Raducanu said. "I'm really glad about how I was able to put that to one side for the match and back up a good week in D.C."
Four-time Grand Slam winner Naomi Osaka of Japan beat Canadian qualifier Ariana Arseneault 6-4 6-2 in breezy conditions to set up a second-round meeting with 13th seed Liudmila Samsonova of Russia.
In the men's tournament, which is being playing in Toronto, Australian Adam Walton roared back from a set down to defeat Frenchman Benjamin Bonzi 4-6 6-0 6-3 and set up a second-round meeting with top seed Alexander Zverev of Germany.
Spaniard Pablo Carreno Busta, the tournament's 2022 champion, came from behind to defeat Liam Draxl 2-6 6-4 6-4.
Several top players withdrew ahead of the Masters and WTA 1000 tournament including world No 1s Aryna Sabalenka and Jannik Sinner, Carlos Alcaraz, Novak Djokovic and Jack Draper.