Retired tennis player Betsy Nagelsen McCormack is selling her nearly 15,000-square-foot mansion in Winderemere, Fla.’s exclusive Isleworth Country Club for close to $13 million, according to the Wall Street Journal.

McCormack, 50, bought the land with her late husband, superstar sports agent Mark McCormack, in 1988 and began building the house in 1989. Mark McCormack, who died in 2003, founded the giant sports agency International Management Group (IMG) in 1960, which grew to represent many sports clients, including Arnold Palmer, Joe Montana, and even Tiger Woods, who also owns a mansion in the Isleworth development.

McCormack’s surname is almost identical to her street name. The seven-bedroom mansion, at 9600 McCormick Place in Windermere, has formal living and dining rooms, a library, a pool and a tennis court, the Journal reported. It sits on the second hole of Isleworth’s Arnold Palmer-designed golf course.