Brazil impressive form, does it means success at the World-cup?

The Brazilian team ended the friendlies with a hot message defeating Austria 3-0. The Brazil team has shown a very impressive performance ahead of the World Cup 2018 in Russia. Despite the team outstanding results in the friendlies, analyst are still worried about the team success at the World cup.
Recently Brazil legend Pele spoke about his fear of the Brazil squad consisting of a players from great club across Europe but the team lacking the ability to play as a team The Brazil team has proved the Legend wrong in their victory as it was a great outing against the Austrians.
The team Captain Neymar after returning from injury has been at his best for the team scoring twice in two matches, he is showing a great form to lead his side to glory at the tournament in Russia. it is hard to judge friendly matches with the main tournament, it is a general questions to you readers ' Does Brazil impressive form mean success at the World cup? but before you answer, read the last paragraph
The team has won all their friendlies, including against the host Russia and the 2014 World cup Champions Germany. The match against Austria ended 3-0 with goals from Gabriel Jesus, Neymar and Coutinho.
In the previous world Cup, the Brazilian squad showed great potentials but didn't even make it to the finals. Despite been the host of the 2014 Fifa world Cup Edition, Brazil lost in the semi final to Germany and lost the third place match to Netherlands Until the end of the tournament, no one knows the winner, although Brazil will be looking forward to win their sixth World Cup title.