Tough five-setter ahead in Men's Semi
Murray knows how to beat him, having done so in their most recent meeting in Cincinnati last year.
Tonight is the test for Novak Djokovic, and Andy Morris expects to find out whether 2011 will prove to be a fluke for the Serb...or not.
The Serbian had such a dominant year last year that there are many experts tipping him to go on and reach the career heights of the likes of Pete Sampras and Roger Federer.
Andy Murray is hoping to at least put a dent in the idea of Djokovic becoming tennis' version of Tiger Woods.
And the Scot has genuine hopes of toppling the number one seed on Rod Laver Arena. He's only dropped 24 games in his last four matches.
Lleyton Hewitt has already shown - albeit just for one set - that Djokovic is not some tennis superhuman.
And Murray knows how to beat him, having done so in their most recent meeting in Cincinnati last year.
Djokovic edges their all-time series six to four, and has the psychological edge of having beaten Murray in last year's final.
One thing that might work in Murray's favour is that his self-belief has gone up a notch since he hired Ivan Lendl as his coach. Lendl was renowned for being an all-business win machine, and some of that aggression and determination has rubbed off.