TORONTO -- Wimbledon quarterfinalist Felix Auger-Aliassime and countryman Denis Shapovalov were ousted from the National Bank Open in their native Canada on Wednesday.
Auger-Aliassime lost his first match, falling 7-5, 6-4 to Dusan Lajovic. Shapovalov dropped a 6-1, 6-4 decision to American Frances Tiafoe.
Auger-Aliassime, who's from Montreal, was the ninth seed in the tournament and had a bye into the second round. He was coming off an opening-round loss at the Tokyo Olympics.
"I just played a lot of tennis, even though I didn't win a lot of matches at the Olympics or the last week," Auger-Aliassime said. "There's a lot of traveling, a lot of practices, a lot of balls hit and maybe that's taken a bit of a toll on me, too. I don't know."
Shapovalov came into the tournament as the No. 5 seed with a bye through the first round.
"Obviously it's not an ideal performance, so I'm definitely not too happy," Shapovalov said after his second round loss.
"[Tiafoe] has a lot of matches under his belt under these conditions and he was the better player today. It was obvious," said Shapovalov, the world No. 10. "I just didn't feel comfortable ever in the match and you could see he was comfortable. ... It's always tough to go up against guys like this."
Tiafoe will face France's Gael Monfils in the third round on Thursday after the tournament's No. 11 seed beat John Millman of Australia 3-6, 6-3, 6-4.
No. 4 seed Andrey Rublev of Russia, seventh-seeded Hubert Hurkacz of Poland, No. 8 Diego Schwartzman of Argentina, 10th seed Roberto Bautista Agut of Spain and American John Isner also won their matches Wednesday to advance, as did Nikoloz Basilashvili of Georgia, who upset 12th-seeded Alex de Minaur of Australia.
In the women's event in Montreal, Canadian wild card Rebecca Marino continued her run by beating Paula Badosa 1-6, 7-5, 6-4.
The 30-year-old Marino upset No. 16 seed Madison Keys in the first round.
Marino had a career-high ranking of No. 39 in 2011, but stepped away from the sport for nearly five years to battle depression. She's currently ranked 220th.
"Any time you can beat a girl who's in the top 100, top 50, it's something to feel good about, particularly as I'm building my ranking back up," Marino said of beating Badosa, who is ranked 31st.
Marino will face Aryna Sabalenka of Belarus in the round of 16 on Thursday.
Sabalenka, the tournament's No. 1 seed, edged American wild card Sloane Stephens 7-6(4), 4-6, 6-4 on Wednesday.
Canadian Bianca Andreescu will also be back in action Thursday, facing No. 13 seed Ons Jabeur of Tunisia in the round of 16.
No 4 Karolina Pliskova of the Czech Rebulic, No. 11 Maria Sakkari of Greece and Coco Gauff, the 15th-seeded American, all won to advance on Wednesday, while Britain's Johanna Konta ousted third-seeded Ukarainian Elina Svitolina.
American Danielle Collins upset No. 6 Simona Halep of Romania, and Jessica Pegula of the U.S. got by 10th-seeded Anastasia Pavlyuchenkova.
The Associated Press contributed to this report.