Novak Djokovic: 'Aussie win is top of my career'

Novak Djokovic has claimed that his Australian Open win over Rafael Nadal is the biggest achievement of his career.

The Serbian retained his Melbourne title after an epic five-set thriller against the Spaniard that lasted nearly six hours.

"It was the longest Grand Slam final of all time. Just hearing that fact makes me cry," the world number one told reporters.

"Wimbledon is right up there because it is the tournament I always wanted to win. But this comes out on top."

The title is Djokovic's fifth Grand Slam of his career.