There's an old saying in the sport of prizefighting that "Boxing is 90% bluffs." The great champion Bernard Hopkins also said, "If you can bluff em you can beat em."In last night's Australian Open final, it appeared that Rafael Nadal tried to bluff Stan Wawrinka, and court observers around the world. After falling into a set and a break hole to a man he's never lost a set to, Nadal tried to change the flow.

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