Novak Djokovic looks for top gear, Kei Nishikori looks for more history, David Ferrer looks to surprise and Victoria Azarenka looks to be capable of anything as we preview day six of the 2015 Australian Open.
Don't miss: Novak Djokovic vs Fernando Verdasco
With all the dramas surrounding Roger Federer and Rafa Nadal, it almost feels like Djokovic has been ignored at this tournament, as much as that is possible for the top seed. But expect the Serbian to click into gear in this match, up against Verdasco who is enjoying a career renaissance. The left handed Spaniard has tasted victory against Djokovic on four occasions, but has never beaten a current world No 1.
Head to head: Djokovic 6-4
Don't bother: John Isner vs Gilles Muller
Unless you like the prospect of watching a million aces and almost no rallies - find something else to do while this match is on. Five of the eight sets these players have contested have ended in a tie-break. Isner is bidding for his best Australian Open result since 2010, when he reached the fourth round while Muller has already equalled his best performance in Melbourne.
Head to head: Isner leads 3-0
Expect a beauty: David Ferrer vs Gilles Simon
Two of the most underrated players in the sport should produce a brilliant match up. Ferrer is a superb counter-puncher while Simon is an excellent shot maker. Expect long rallies and plenty of drama. Simon won their last encounter at the US Open in four sets, breaking a run of three successive defeats to the Spanish player.
Head to Head: Ferrer leads 5-2
