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Camila Giorgi

GLONDON, ENGLAND - JUNE 29: Camila Giorgi of Italy hits a forehand return during her Ladies' singles third round match against Nadia Petrova of Russia on day five of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on June 29, 2012 in London, England. (Photo by Dan Kitwood/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.