Until 1983 or so, the draws were pretty weak at the Australian Open. The remoteness of the continent relative to Europe and North America and costs of travel back then kept many of the best players in the world—like Roy Emerson and Rod Laver—away. However, in 1976, the Aussie Open still had all of Australia’s biggest tennis stars, including two-time French Open champ and two-time U.S. Open champ Ken Rosewall, as well as three-time Wimbledon champ and two-time U.S. Open champ John Newcombe. So when the No. 212 player in the world, Mark Edmondson, defeated John Newcombe en route to winning the whole tournament in 1976, that was still a pretty huge deal. And it takes the top spot on our list of the biggest upsets in the history of men’s tennis.