They had a storm and had to move all of the matches to the two indoor stadiums with roofs. They didnt expect Federer to struggle with a scrub and they dont play a 5th set tiebreaker so Federer's match went to 10-8 in the 5th. All of the Aussie fans had been waiting in line for hours to get tickets for Hewitts match so they went ahead and played it before finishing at 430 am.

I dont think they would have started it that late if it wasnt for it being an Aussie player and the fans anticipating the match.