American Ryan Harrison pulls off first big upset of US Open

The third day of US Open action delivered the tournament’s first big shocker as world No. 120 Ryan Harrison stunned Wimbledon runner-up Milos Raonic in the second round.

The 24-year-old Texan prevailed 6-7 (4), 7-5, 7-5, 6-1 over the fifth-seeded Raonic to make his first-ever appearance in the third round of a Grand Slam.

“It was extremely physical out there but I was playing on adrenaline,” Harrison told reporters after the match. “This is a big win for me. I have been playing well all summer.”

Raonic struggled with injuries and cramps throughout the match. He took a medical timeout in the third set to tend to an ailing left wrist, but the heat and humidity seemed to take a greater toll on the Canadian’s body. Raonic looked completely spent as the match grew on, wincing with every movement and barely putting up a fight in the fourth and final set.

Harrison’s performance highlighted a strong day for the American men, as Jack Sock and John Isner also advanced to the third round.