Michael Mmoh ends John Isner's career with 5-set win at US Open - ESPN

NEW YORK — John Isner's 17-year tennis career came to an end Thursday after his second-round loss to fellow American Michael Mmoh, 3-6, 4-6, 7-6 (3), 6-4, 7-6 (7), at the US Open.

The former world No. 8 announced he would be retiring after the tournament with a social media post last week.

After a match that lasted just under four hours, 38-year-old Isner addressed the packed crowd at Grandstand through tears and sniffles.

«This is why I've worked as hard as I have my whole life, to play in atmospheres like this,» Isner said. «I might not win them all, as we know, just like today. To play in front of this crowd and have the support I've had is pretty special.»

As he walked off the court, he received a standing ovation from those in the stands and stopped to wave in appreciation before reaching the exit.

Isner leaves tennis having reached some of the sport's highest levels. A star at the University of Georgia, winning the NCAA doubles title in 2005 and the team title in 2007, Isner turned pro in 2007 and surprised even himself with what he was able to achieve throughout his career.

«I think I've overachieved,» Isner said Friday. «I never imagined myself having this much success for this long.»

Those achievements include 16 ATP singles titles, eight doubles titles, a Wimbledon semifinal appearance in 2018 and a streak of 10 seasons in which he finished in the year-end top 20. For eight of those seasons, he was the top-ranked American man. He also is the ATP's record holder for most career aces with 14,470 — he added 48 more to his total in his final match — and for the fastest serve at 157.2 miles per hour.

«I believe he has the best serve in the history of the game,» three-time major champion Andy Murray said Tuesday.