World No.1 Rafael Nadal needed more than 3 hours to overcome young Japanese star Kei Nishikori 7-6,7-5,7-6 to reach the quarter finals at the Australian Open.
The Spaniard will have to get past another up-and-coming star in Bulgarian Grigor Dimitrov to book his place in the semifnals.
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What is the foot injury that has troubled Rafael Nadal over the years? Check here
