Is Rafael Nadal an Unstoppable Force Entering 2014 Australian Open Men's Final?

On Sunday in the Australian Open men's final, first-time slam finalist Stanislas Wawrinka will try and upset Rafael Nadal. It won't be an easy task. Since coming back from his seven-month layoff to rehab his knee last February, Nadal has made the finals of three of the past four slams, winning at the French Open and the U.S. Open. Now, he's trying to make it a clean sweep with the title in Melbourne.  In the last 12 months, Nadal is an unthinkable 86-7 with 11 titles. Of his seven losses, thre...