Portugal, fifth in the FIFA rankings, are in what is rated as the toughest group at this year's championships.

Bento's men take on Germany before facing Denmark and then the Netherlands and Ronaldo is confident Portugal's coaching staff will have the players ready for their opening game on June 9.

"The coaches know better than anyone what we have to do," Ronaldo said.

"When it is a short period of time to build a team it is quite difficult, but we have around 20 days to prepare for the first game so we have enough time to prepare the team, to do the strategies, the tactics and to beat Germany in the first game."

The Portuguese forward won his first La Liga title with Real Madrid at the start of May but has set his sights even higher for next season.

"I think it's possible (to win all six trophies next year)," Ronaldo said.

"We have a great team - the base is still the same and we're going to have new players.

"So we have everything we need to have a great season and of course we will look to win six trophies."