Top-seeded Rafael Nadal opened his Rogers Cup title defense Wednesday, beating England's Daniel Evans 7-6 (6), 6-4 in a second-round match delayed by rain three times.

After rain delays of six and 30 minutes, Nadal fought off two set points in the first-set tiebreaker. Play was stopped for 1 hour, 56 minutes with Nadal leading 2-0 in the second set.

"All the matches are difficult here," Nadal said. "It was a tough first set. Then in the second, I was able to take advantage at the beginning, but then he broke me back."

The 33-year-old Spanish star, a four-time Rogers Cup champion, will face Argentina's Guido Pella in the third round. Pella beat Moldova's Radu Albot 6-3, 2-6, 7-6 (2).

Second-seeded Dominic Thiem beat Canada's Denis Shapovalov 6-4, 3-6, 6-3. Coming off a victory on clay at the Generali Open in his native Austria, Theim will face 14th-seeded Marin Cilic of Croatia,

Cilic topped Australia's John Millman 6-3, 6-4.

Felix Auger-Aliassime won an all-Canadian match when Milos Raonic retired because of a back injury. Auger-Aliassime won the first set 6-3, and Raonic took the second 6-3 before stopping play.

Poland's Hubert Hurkacz upset fourth-seeded Stefanos Tsitsipas of Greece 6-4, 3-6, 6-3, France's Richard Gasquet beat fifth-seeded Kei Nishikori of Japan 6-7 (6), 6-2, 7-6 (4); France's Adrian Mannarino, topped 11th-seeded Borna Coric of Croatia, 6-2, 6-1; ; and Cristian Garin of Chile knocked off 12th-seeded American John Isner 6-3, 6-4.

Sixth-seeded Karen Khachanov of Russia edged Stan Wawrinka of Switzerland 6-4, 6-7 (3), 6-2; seventh-seeded Fabio Fognini beat American qualifier Tommy Paul 7-6 (3), 6-3; eighth-seeded Daniil Medvedev of Russia topped Kyle Edmund of Britain 6-3, 6-0; and 10th-seeded Roberto Bautista Agut of Spain edged Diego Schwartzman of Argentina 6-2, 7-5.