Nadal has broken serve in the 6th game of the second set, and leads 4-2.
Worth nothing that it was only Nadal's 5th break point of the match, of which he's converted 4.
Djokovic is 5/16 break point conversions. Noteably 1 for 5 in the first set where Nadal won 7-5, and 0 for 3 in the fourth set which Nadal won in a tiebreaker.
This match is now officially the longest match in Australian Open history.