Maria Sharapova, a five-time Grand Slam winner, retires at age 32

Maria Sharapova was a transcendent star in tennis from the time she was a teenager, someone whose grit and groundstrokes earned her a career Grand Slam and whose off-court success included millions of dollars more in endorsement deals than prize money.

And yet, Sharapova walked away from her sport rather quietly Wednesday at the age of 32, ending a career that featured five major championships, time at No. 1 in the WTA rankings, a 15-month doping ban and plenty of problems with her right shoulder.