Les Bleus failed to win any of their three summer tour Tests against South Africa and Australia between June 18 and July 2.

They drew 30-30 with the Springboks in Durban before suffering a 27-13 defeat to the same side in Port Elizabeth on June 25.

And on Saturday, Laporte's men lost again, slipping to a 37-31 defeat to Australia in Brisbane despite a convincing display.

It's good to see the way they played but they (the Southern Hemisphere teams) are ahead of us, said Laporte.

We must accept the superiority of the south. There are two rugby hemispheres and the one that wins is theirs.

Laporte is adamant his side will have to work on their physical capabilities if they are win the World Cup in France in two years' time.

The French players must work harder, he said.

An international cannot have the same programme as his clubmates who are not part of the French national team.

Hard work alone is not enough to compete with Australia and New Zealand.

And when we think about the World Cup, what counts the most is to beat the Southern Hemispheres sides.

Despite the three winless matches, Laporte remains optimistic about his side's displays.

This tour was positive considering the team was quite inexperienced, Laporte added.

We had two good matches in Durban and Brisbane. We are satisfied with (Sebastien) Bruno, (Dimitri) Szarzewski, (Olivier) Milloud, (Pascal) Pape, who have certainly reached a new level.

Remy (Martin) performed two great matches and Julien Bonnaire has what it takes to become a fantastic number eight.

In the back row, Yannick (Jauzion) did well overall and (Benoit) Baby was interesting.

France's next important tournament will be the November Test matches, when they will face Australia, Canada, Tonga and South Africa from November 5 to 26.