Tennis pro Andy Roddick announced his retirement from the sport in a press conference held Thursday at the U.S. Open after citing heath concerns.

"I just feel like it's time," Roddick said in the press conference. "I don't know that I am healthy enough or committed enough to go another year."

Roddick added his health has been a concern for his game throughout the year.

"I've thought all year that I would know when I got to this tournament," he said. "When I played my first round, I knew. Certain parts throughout the year, I've thought about it and with the way my body feels and with the way I'm able to feel like I'm able to compete, I don't know it's good enough."

Roddick burst onto the tennis scene in 2003 when he became the youngest American and the second youngest overall to finish No. 1 in the history of the ATP rankings since 1973 when he won the U.S. Open that year.

His continued on that momentum the next year, winning four titles and led the U.S. to the first Davis Cup final since 1997.

He was also a three-time finalist at Wimbledon in 2004, 2005 and 2009 and a U.S. Open finalist in 2006.

Roddick is known on the court for his powerful serve and his off-forehand shot, but that has been less prevalent after a series of leg injuries. His personality also made a splash on the court, with noted outbursts toward umpires and linesmen on the court in 2008, 2010 and 2011.

Even with his personality, Roddick is known by his fans as one of the best players to in the game as many took to Twitter to express their feelings about his retirement.

Going to miss Andy Roddick after he retires following the US Open! Always was fun to watch.Gene Cuglietta

Love him or hate him, Andy Roddick has been an exciting player to watch throughout the years. Gave it all every game he played.Bala Pitchandi

Ah Andy Roddick I will truly miss u :(amina laswad

Even with his retirement, Roddick said he his looking forward to life after his career.

"I have a lot of interests and a lot of other things that excite me, and I'm looking forward to those."

For more on Roddick's legacy, visit the U.S. Open website at http://www.usopen.org/.

Andy Roddick calls time on his professional tennis career as he retirestelegraphtv