Annette Van Zyl, also known by her married name as Annette du Plooy, is a South African former tennis player. She was ranked in the top ten female players during the mid-1960s, and in 1966 she won the French Open Mixed Doubles title with Frew McMillan, defeating Ann Haydon-Jones and Clark Graebner in three sets.

Frew Donald McMillan is a former professional tennis player from South Africa who won five grand slam doubles titles including three Wimbledons with Bob Hewitt. All together, he won 63 doubles titles, surpassed only by the Bryan brothers, Daniel Nestor, Mark Woodforde, Todd Woodbridge, John McEnroe and Tom Okker. He was also ranked No.1 in Doubles on the ATP Computer for a significant period from 1977 to 1979 when he was aged 37.