John Isner has played his final match of his ATP.

The former Georgia tennis star was eliminated from the US Open Thursday in a 5-set loss to Michael Mmoh.

Isner, known for his prolific serves, retires with 16 career ATP Titles, a Grand Slam semifinal appearance (2018 Wimbledon) and is the ATP’s all-time aces leader (14,470) since stat was first tracked in 1991. He was the top-ranked American man for 8 seasons throughout his career.

While he would have liked to end his career on a win, the US Open match was the perfect environment to finish his career.

“This is why I worked as hard as I have my whole life, to play in atmospheres like this,” Isner said following the match. “Of course I may not win them all, as we know, just like today. But to play in this crowd, in front of this crowd, and have the support I had was pretty special.”

While playing for Georgia, Isner achieved an NCAA doubles title in 2005 along with a team title in 2007 before going pro.