Alex Michelsen has beaten compatriot Learner Tien to advance at the Canadian Open. The 20-year-old, who has a ‘world-class backhand,’ defeated his good friend 6-3 6-3 on Saturday evening in Toronto.

The Americans returned to the courts in both Toronto and Montreal, with a hard-fought victory for Madison Keys over Karolina Muchova, saving a couple of match points, while Frances Tiafoe was ...