American Tennis Takes Huge Hit After Frances Tiafoe's Upset Loss At US Open

What was already a bad day for the top American men's tennis players just got substantially worse.

On Friday afternoon, Ben Shelton had to retire during his match against Adrian Mannarino. The No. 6 ranked player in the world suffered an apparent shoulder injury on the point that sealed the third set for him. Although he wanted to continue fighting and complete what would've been a five-set marathon, he decided it was best to put his left shoulder on ice.

Shelton, who won a Masters 1000 title earlier this summer, was seen telling his box that he was dealing with the "worst pain I’ve ever felt in my life." We're certainly hoping he'll return to action in the near future.

Roughly than an hour after Shelton's run at the US Open came to an end, Frances Tiafoe suffered a devastating loss to Jan-Lennard Struff. Despite being a heavy favorite coming into Friday's third-round match, he lost 4-6, 3-6, 6-7.

Tiafoe, a two-time semifinalist at the US Open, usually plays his best tennis in New York. Unfortunately for the Maryland native, he just didn't have his A-game today.