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The Championships - Wimbledon 2013: Day Three

LONDON, ENGLAND - JUNE 26: Karin Knapp of Italy celebrates a point during her Ladies' Singles second round match against Lucie Safarova of Czech Republic on day three of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on June 26, 2013 in London, England. (Photo by Dennis Grombkowski/Getty Images)

2013 Wimbledon: Meet the giant killers

Every Grand Slam has its share of underdogs who beat the odds and upset their fancied opponents.

The 2013 edition of Wimbledon - the third Slam of the year - is no different as former champions Roger Federer, Maria Sharapova and Rafael Nadal have already been dumped out in the first three days.

ALSO SEE: A day of upsets and pullouts at Wimbledon; Stakhovsky brings down 'the legend and his ego'; "Dreddy" hails his greatest win at a grand slam; Nadal suffers recurring Wimbledon nightmare.