Were both Bob Lutz and Billie Jean King professional tennis players?
Billie Jean King Billie Jean King ("née" Moffitt; born November 22, 1943) is an American former World No. 1 professional tennis player. King won 39 Grand Slam titles: 12 in singles, 16 in women's doubles, and 11 in mixed doubles. King won the singles title at the inaugural WTA Tour Championships. King often represented the United States in the Federation Cup and the Wightman Cup. She was a member of the victorious United States team in seven Federation Cups and nine Wightman Cups. For three years, King was the United States' captain in the Federation Cup.
1980 Wimbledon Championships – Women's Doubles Billie Jean King and Martina Navratilova were the defending champions but lost in the semifinals to Kathy Jordan and Anne Smith.