Australian Open 2013: five things we learned in Melbourne this week

We are at the halfway point of the Australian Open and a few things have become clear.

Never give up: Novak Djokovic celebrates after winning a marathon match against Stan Wawrinka

Djokovic’s spirit is indomitable

Novak Djokovic is the man who will not lie down. It does not matter how many times you think you have driven a stake through his heart, he just keeps coming back from the dead, as a tearful Stan Wawrinka discovered at 1.40am last night when their five-set epic finally ended with the Serb’s victory.