Taylor Fritz and Ben Shelton won Tuesday in the quarterfinals of the National Bank Open, setting up the first all-American semifinal in an ATP Masters 1000 tournament in 15 years.

Alexander Zverev has won four of his last five matches. This week in Toronto, Zverev defeated Walton in the opening round in straight sets.

De Minaur, who is coming off a title at ATP Washington, benefited from a walkover in the Round of 32 before dispatching Frances Tiafoe in his previous match. De Minaur is always a dangerous player because of his tireless work ethic, but it becomes even trickier to beat him when he’s got a full tank.