Tennis promoter instrumental in arranging the first network broadcast of women's tennis. She was among the first female promoters in the sport. She staged the Maureen Connolly Brinker Memorial Tournament in 1969; in '72 it became the first televised women's tournament and the first to award prize money. The tournament evolved into the Virginia Slims of Dallas. She and Connolly, a nine-time Grand Slam singles champion, co-founded the Maureen Connolly Brinker Tennis Foundation to help get more people involved in the sport. Jeffett was the longtime chairman of both the US Wightman Cup and Federation Cup. She was the only American woman who wasn't a Wimbledon champion to be named an honorary member of the All England Lawn Tennis & Croquet Club.