Alex Michelsen of the United States reached the quarterfinals of the men’s National Bank Open in Toronto with a straight sets win over countryman Learner Tien. The 26th-seeded

Alex Michelsen pulled off a comeback for a notable upset in the third round of the National Bank Open at Toronto on Thursday, but getting to the finish was no easy feat.

Alex Michelsen of the United States upset third-seeded Lorenzo Musetti of Italy 3-6, 7-6 (4), 6-4 on Thursday in the third round of the National Bank Open.