Frew McMillan and Billy Martin, have which previous occupation in common?
Frew McMillan: Frew Donald McMillan (born 20 May 1942) is a former professional male tennis player from South Africa who won five major doubles championships including three Wimbledons with Bob Hewitt. Billy Martin (tennis): Billy Martin (born December 25, 1956, in Evanston, Illinois, United States), is a right-handed former professional tennis player from the United States.
professional tennis player