Murray booked his place in the last eight in Melbourne after seeing off American John Isner in straight sets and now faces Rafael Nadal for a place in the semi final.
The Spaniard is on offer at 9/2 with Sportingbet for the title after he defeated Ivo Karlovic and 21/20 at Boylesports to beat the British number one in the match scheduled for 8am on Tuesday morning.
Federer plays Lleyton Hewitt on Monday morning at around 8am and is 8/15 at totesport to win in straight sets.
Marin Cilic kept his hopes alive with a five-set win over fourth seed Juan Martin del Potro and he is now a 14/1 chance with Paddy Power.
Novak Djokovic (7/1 William Hill) and Nikolay Davydenko (8/1 Betdaq) are hot favourites to make it through to the quarter finals when they play Lukasz Kubot and Fernando Verdasco respectively in the early house of Monday morning.
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