Rafael Nadal to retire from tennis at end of season

(Photo credit: Kirby Lee-Imagn Images)
Superstar Rafael Nadal announced Thursday that he will retire from professional tennis at the end of the season.

A 22-time Grand Slam champion who owns a record 14 French Open titles, Nadal has been hampered by foot and abdominal injuries in recent years.

"Hello everyone. I'm here to let youknow that I am retiring from professional tennis," Nadal, 38, said in Spanish in a video pos