Which tennis player has retired, Hank Pfister or Maria Sharapova?
Hank Pfister: Hank Pfister (born October 9, 1953) is a former tennis player from the United States, who won two singles titles (1981, Maui and 1982, Newport) during his professional career. Maria Sharapova:  A United States resident since 1994, Sharapova has competed on the WTA tour since 2001.
Hank Pfister