Alex Michelsen of the United States has reached the quarterfinals of the National Bank Open with a straight sets victory over Learner Tien. The No. 26 seed swept his countryman 6-3, 6-3 in the round of 16 at the ATP Masters 1000 tennis tournament Saturday.

TORONTO — 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 Michelsen swept Tien 6-3, 6-3 in their fourth-round match in the Masters 1000 tennis tournament.

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.