In the mid-1970s, Casals also joined another new venture, World Team Tennis, in which teams consisting of two women and four men apiece traveled across the U.S. Casals played for the Detroit Loves and Oakland Breakers and coached the Los Angeles Strings. She retired shortly after having knee surgery in 1978. The International Tennis Hall of Fame inducted her in 1996. "Doubles was her shtick, 56 of them with King," Collins wrote. "But Rosie was a singles contender at all the majors. She just wanted to be the best ever. Inch-for-inch she was—and the fun flowed in all directions from this diminutive dynamo who took such joy from playing, and passed it all along to grateful witnesses."