PICTURES

Tennis: Sharapova dumped out of Australian Open by Cibulkova; second upset in two days

Russia's Maria Sharapova gestures during her women's singles match against Slovakia's Dominika Cibulkova on day eight of the 2014 Australian Open tennis tournament in Melbourne on Jan 20, 2014. -- PHOTO: AFP
Russia's Maria Sharapova gestures during her women's singles match against Slovakia's Dominika Cibulkova on day eight of the 2014 Australian Open tennis tournament in Melbourne on Jan 20, 2014. -- PHOTO: AFP
Russia's Maria Sharapova gestures during her women's singles match against Slovakia's Dominika Cibulkova on day eight of the 2014 Australian Open tennis tournament in Melbourne on Jan 20, 2014. -- PHOTO: AFP
Russia's Maria Sharapova gestures during her women's singles match against Slovakia's Dominika Cibulkova on day eight of the 2014 Australian Open tennis tournament in Melbourne on Jan 20, 2014. -- PHOTO: AFP
Slovakia's Dominika Cibulkova plays a shot during her women's singles match against Russia's Maria Sharapova on day eight of the 2014 Australian Open tennis tournament in Melbourne on Jan 20, 2014. -- PHOTO: AFP
Slovakia's Dominika Cibulkova plays a shot during her women's singles match against Russia's Maria Sharapova on day eight of the 2014 Australian Open tennis tournament in Melbourne on Jan 20, 2014. -- PHOTO: AFP
Slovakia's Dominika Cibulkova serves during her women's singles match against Russia's Maria Sharapova on day eight of the 2014 Australian Open tennis tournament in Melbourne on Jan 20, 2014. -- PHOTO: AFP
Slovakia's Dominika Cibulkova serves during her women's singles match against Russia's Maria Sharapova on day eight of the 2014 Australian Open tennis tournament in Melbourne on Jan 20, 2014. -- PHOTO: AFP
Dominika Cibulkova of Slovakia celebrates defeating Maria Sharapova of Russia in their women's singles match at the Australian Open 2014 tennis tournament in Melbourne on Jan 20, 2014. -- PHOTO: REUTERS
Dominika Cibulkova of Slovakia celebrates defeating Maria Sharapova of Russia in their women's singles match at the Australian Open 2014 tennis tournament in Melbourne on Jan 20, 2014. -- PHOTO: REUTERS
Maria Sharapova of Russia reacts during her women's singles match against Dominika Cibulkova of Slovakia at the Australian Open 2014 tennis tournament in Melbourne on Jan 20, 2014. Sharapova was dumped out of the Australian Open on Monday with a 6-3,
Maria Sharapova of Russia reacts during her women's singles match against Dominika Cibulkova of Slovakia at the Australian Open 2014 tennis tournament in Melbourne on Jan 20, 2014. Sharapova was dumped out of the Australian Open on Monday with a 6-3, 4-6, 1-6 fourth round loss to Slovakia's Dominika Cibulkova on Rod Laver Arena. -- PHOTO: REUTERS

(REUTERS) - Third seed Maria Sharapova was dumped out of the Australian Open on Monday with a 6-3, 4-6, 1-6 fourth round loss to Slovakia's Dominika Cibulkova on Rod Laver Arena.

The 2008 champion had to take a medical time-out between the second and third sets for treatment on an undisclosed injury. She was grimacing when bending over and grabbing her lower back during the final set.

Sharapova's demise comes a day after Serbia's Ana Ivanovic beat world number one and title favourite Serena Williams, also in the fourth round.

"I watched that match, it was a great match for Ana, but this was a little bit of a different story," Cibulkova said in a courtside interview.

"The most important thing was that I went on the court and I was 100 per cent sure I could win this match. I wasn't doubting myself."

Sharapova took the first set 6-3 as both players struggled with their serve, but Cibulkova won the second after racing to a 5-0 lead, which the Russian pegged back, before the diminutive Slovak finally held serve to send the match to a decider.

Sharapova then took the medical time-out but was unable to halt Cibulkova's momentum as the Slovak raced through to win the set and reach her first Australian Open quarter-final.

She will meet either eighth-seed Jelena Jankovic or 11th-seeded Romanian Simona Halep for a place in the last four.

"I just kept going. I knew what I had to do and I was doing exactly the right things," Cibulkova added. "The most important thing is to believe in yourself."