And the upsets just keep on coming down under. Maria Sharapova, the No. 3 seed at the Australian Open, lost to No. 20 Dominika Cibulkova in the fourth round. Sharapova, a four-time Grand Slam winner, exits the tournament hot on the heels of Serena Williams, who also suffered a major loss. This wasn't the first time Sharapova lost to Cibulkova. In the 2009 quarterfinals of the French Open, she fell to the Slovakian tennis player. Cibulkova said “I went on the court, and I was more than 100 percent sure that I really can beat her. I did it before, and I knew she knows me.” We don't want to jinx it, but Roger Federer just made it to the quarterfinals.