World number one Novak Djokovic has his sights set on a calendar year Grand Slam.

The Australian Open champion has cruised into the Madrid Masters quarters with a straight sets demolition of Spaniard Roberto Bautista Agut.

This month's French Open is the one slam to so far elude him, but Djokovic thinks he can win all four.

He says he would lie if he said he can't because he believes in himself and always has.

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Defending champion Andy Murray is also into the Madrid quarter finals along with rising Australian star Nick Kyrgios.