The contenders for the Australian Open

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The Independent Online

The action is underway in Melbourne and the first Grand Slam of the year is wide open.

Click here or click the image to launch our guide.

Defending champion Rafael Nadal is returning to form, Juan Martin Del Potro is tipped to follow up his US Open victory while Andy Murray has again been widely backed to claim his first major.

Here, we take a look at the chances of the top seeds...