MotoGP champion and undefeated 2014 title leader Marc Marquez will have his dominance tested by an all-new venue this weekend in Argentina.

Marquez arrives on top of the world and on top of his game, defying a pre-season broken leg to claim victory in Qatar and Texas.

But the newly modified Termas de Rio Hondo circuit is a step into the unknown, being MotoGP's first South American round since Rio 2004 and the first Argentine event since 1999 in Buenos Aires.

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"It will be an interesting weekend for everybody. One year ago some riders came here but the track wasn't finished yet," said Marquez on Thursday.

"We will need to work a little bit more than usual to get up best feeling, find the best line and adapt our setup to this tarmac and this layout.

"The track looks very good. I think it will be fun, it has some long corners which will be great for the slides. I expect that the tarmac will be a little bit slippery at the beginning, but anyway it looks good and we will try to do our job as always.

"We will try to focus and concentrate because every lap will be important for the electronics, the set-up and to learn the track."

Regarding his healing leg, Marquez declared: "Still I am not able to run, but on the bike we can say I am now 100%."

But after such a perfect start to the season, Marquez admitted that he is feeling the pressure of expectation.

"I feel strong because of the two wins, my confidence is high and of course you feel the pressure because everyone is expecting a lot of you. But anyway I will try to do my best.

"Now we are in a great moment, we will try to manage that moment and remember that the championship is very long and that anything can happen. So if we are strong again here and can fight for the victory then we will if not we will take points of the championship."

Marquez added that the people he surrounds himself with play a vital role in keeping him relaxed.

"You cannot do it alone. The most important is the people around you that have the same mentality and can help you to stay calm. But anyway I think the key is because I enjoy it and I would like to stay here at this level for many, many years."

That is worrying news for his rivals, while of more immediate concern will be Marquez's impressive past form at first time venues, including a first MotoGP victory in the inaugural 2013 Texas MotoGP round, although he had been among a select group to benefit from a private pre-season test.

Nevertheless, Marquez was also a winner from pole in the 2010 125cc Silverstone round and was on pole for the inaugural Aragon round that same year, only to be taken down at turn one of the race.

Marquez was only six years old when the last Argentine Grand Prix was held, an event that saw Marquez's manager Emilio Alzamora finish a close second to Marco Melandri in the 125cc class.

That was enough to hand Alzamora his only world title by a single point over the young Italian, despite not winning a race that season. Alzamora had previously won the 1995 Argentine round.

Marquez will start his quest to become an Argentine GP winner during opening practice on Friday morning.