Rookie Marc Marquez will have the first of three chances to claim the 2013 MotoGP World Championship this weekend at Phillip Island, Australia.

No rookie has won the premier-class crown since Kenny Roberts in 1978, but Marquez arrives 'down under' with a commanding 43-point advantage over Yamaha's reigning double champion Jorge Lorenzo and 54-point lead over Repsol Honda team-mate Dani Pedrosa.

If Marquez is at least 51 points ahead of both Lorenzo and Pedrosa after Sunday's race, he will be confirmed as world champion.

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"It was a good weekend in Malaysia and we took some very important championship points," said the 20-year-old, second to Pedrosa last Sunday at Sepang.

"Now, without any time to rest, we head to Australia for the next race and we need to maintain the same direction and mentality as it's working for us in this moment.

"Phillip Island will be important for the championship as there are only three races to go and every point makes a difference, but we will try to approach it as we do every race weekend, work hard from the beginning and keep our concentration."

Marquez - a title winner in both the 125cc (2010) and Moto2 (2012) classes - has won six races so far this season, an all-time rookie record, and finished off the podium just once. Lorenzo has won fives times and Pedrosa three.

Marquez joined MotoGP in place of retired double champion Casey Stoner, who will return to the paddock this weekend - and ride alongside fellow Australian world champions Mick Doohan and Wayne Gardner in a lap of honour before Sunday's race.