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.

Semifinal action at the ATP Toronto Masters promises two entertaining matches. Ben Shelton can bridge the gap to Taylor Fritz in the race to become the U.S.

Taylor Fritz battled into Monday morning before finally getting past Czech Jiri Lehecka with a 7-6 (7/4), 6-7 (5/7), 7-6 (7/5) victory in three hours to reach the quarter-finals of the ATP Toronto Masters.