Ben Shelton beat Alex de Minaur in straight sets to secure a hold on the World No. 7 ranking and advance to his first career Masters 1000 semifinal.

It's a clash of the Americans, as Ben Shelton and Taylor Fritz vie for a spot in the National Bank Open title match.

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.