As the U.S. Open prepares to get under way in the next few weeks, it is interesting to look back on the history of this illustrious tournament, one which serves as the final Grand Slam of the calendar year and has since the Australian Open moved from December to January in 1987.
Many records have been set at the U.S. Open by men and women playing the tournament in New York.
American Jimmy Connors, American Pete Sampras, and Swiss Roger Federer hold the most single titles on the men's side with five each, though Federer's wins were consecutive from 2004-2009, a record in the modern era.
Chris Evert of the United States holds the most single titles on the ladies side with six, winning four consecutively from 1975-1978, again a record in the modern era.
But these accomplishments as well as those of other top players have been previewed time and again before each U.S. Open gets under way.
But what about the upsets when a champion who was expected to win goes down to defeat by someone who no one expected to win the match? Following in chronological order are the biggest upsets in U.S. Open history during the modern era.