Question: When was former professional tennis player, tennis coach, and the current commissioner of World TeamTennis, who won the 1976 US Open women's doubles title with Linky Boshoff?
Sentence (from "Linky Boshoff"): Delina Ann Boshoff-Mortlock, commonly known as Linky Boshoff, (born 12 November 1956), is a former professional tennis player who won the 1976 US Open women's doubles title with her partner Ilana Kloss.
Relevant evidence: Yes