Milos Raonic won a match at the U.S. Open for the first time with a five-set victory over Santiago Giraldo.

The 15th-seeded Canadian beat Giraldo 6-3, 4-6, 3-6, 6-4, 6-4 on Tuesday in 3 hours, 25 minutes. The 21-year-old is ranked a career-best 16th.

Giraldo, a 46th-ranked Colombian, is 1-6 in his career in five-set matches.

Raonic had 30 aces, including four on second serves, but 15 double-faults. Raonic's average first serve was 123 mph to 103 mph for Giraldo.