Milos Raonic overcame a mistake-filled performance to beat Carlos Berlocq in first-round action at the U.S. Open.
Raonic had 45 unforced errors in the four-set match, but made up for it by winning 91%of his first serve points.
Earlier on Monday, Simona Halep became the first No.1-seeded woman to lose in first round of the U.S. Open in the professional era.
Halep was beaten 6-2, 6-4 by 44th-ranked Kaia Kanepi of Estonia in a match that was stunningly lopsided and lasted all of 76 minutes.
Halep won the French Open in June for her first Grand Slam title — but this is the second year in a row she exits the U.S. Open in the first round.
— with files from Metro Source