Mark Knowles

Mark Knowles (born 4 September 1971) is a professional tennis coach and former professional tennis player from the Bahamas, former number 1 in world specialising in doubles tennis. He won all of the Grand Slam tournaments, most notably partnering with Daniel Nestor. At various times between 2002 and 2005 he was ranked World No. 1 in doubles. He is a five-time Olympian.