This is/was Dr. Renee Richards, a former golfer who had a sex-change operation back in the 1970s before turning to professional women's tennis. Her doubles partner was John Lucas, an African-American NBA point guard and college star before his career was cut short by substance abuse.
Lucas and Richards represent, in my mind, the ultimate mixed doubles tennis team. You just can't get much more mixed than a black man who used to be a basketball star and a white woman who used to be a white man. Not to mention both had, let's say, more issues than Time magazine.