06:00 CET - After a long rain delay and even longer matchup, Jessica Bouzas Maneiro knocks off Lin Zhu 7-5, 1-6, 6-2 in Montreal.
05:25 CET - Francisco Cerundolo retires with an abdominal injury as Alexander Zverev advances after 6-4, 1-0.
04:10 CET - Lin Zhu vs. Jessica Bouzas Maneiro has resumed play.
03:35 CET - Yet another upset! Alexei Popyrin upsets world's No. 9 Holger Rune 4-6, 6-2, 6-3. It is now Popyrin's 13th career win against a top-10 opponent as he's on to his fourth Masters quarter-final.
03:05 CET - Rain delay in Montreal! The match between Lin Zhu vs. Jessica Bouzas Maneiro is currently delayed due to rain in Montreal. There will be no play for the next 30-45 minutes. Zhu leads 2-0 in the first set.
02:35 CET - Major upset alert! Victoria Mboko takes down Coco Gauff 6-1, 6-4! At just 18 years old, Mboko earns her first-ever win against a top-10 player and on her home court in Montreal as well!
00:35 CET - After two-and-a-half hours, Elena Rybakina completes the comeback over Dayana Yastremska 5-7, 6-2, 7-5.
The win marks Rybakina's 36th win of the year and will be her second-ever Montreal quarterfinals appearance.
22:03 CET - The eighth seed is out in Toronto! Casper Ruud has lost 6-4, 7-5 to Karen Khachanov, who looked very impressive indeed on his way to a tenth Masters 1000 quarter-final.
21:31 CET - 24th seed Marta Kostyuk has fought back from a set down to beat young American McCartney Kessler 5-7, 6-3, 6-3 in a battle that lasted for almost three hours.
20:12 CET - The first match of the day in Toronto has been won by Alex Michelsen, who has beaten compatriot and close friend Learner Tien 6-3, 6-3 to reach a Masters 1000 quarter-final for the first time in his career.
18:42 CET - We're now underway in both Toronto and Montreal, so stay tuned for all the latest news and updates!
15:00 CET - Good afternoon and welcome to our coverage of today's tennis in Canada!
Play gets underway in a few hours at 18:30 CET, when rising American star Learner Tien takes on compatriot Alex Michelsen, and on the women's side of the draw, Marta Kostyuk faces McCartney Kessler.
The headline clash of the day comes between fifth seed Holger Rune and defending men's champion Alexei Popyrin, while Coco Gauff, Elena Rybakina and Alexander Zverev all continue their campaigns in North America.
Check out the full draws in Toronto and Montreal via the links.