Watch: Nadal hits running forehand slice winner to secure crucial hold

Rafa Nadal was in a bit of a tricky spot, trailing Roger Federer two sets to one and trying desperately to preserve his one-break lead in the fourth.

Serving at 3-1, he'd let three game points slip away, and looked as though he'd make it a fourth. After an incredible defensive save, Federer squared up a nasty cross-court backhand that stretched Nadal from the deuce court to the ad doubles alley.

It was miraculous enough that Nadal got a racket on the ball. But he also managed to hit a lunging forehand hack-slice that landed for a short-angled winner to make it 4-1 as a stunned Federer looked on.

Nadal went on to win the set to push the match to a fifth, at which point Federer, finally, triumphed.