Barcelona and Chilean midfielder Arturo Vidal has supported Messi decision to leave Barcelona and he also said Barcelona have to change the way they think.

Barcelona have done things that don’t fit with a team at the top level.“Vidal said.

“In the end, you realise this when you face an organised team, a team that has a winning mentality, with players that are physically prepared and that has a very strong game plan.

“That takes its toll when you’re weak in the head and in energy, that happened to us.”

Barcelona first have to change the way they think because football has evolved a lot. DNA is being left behind and other teams are improving in other aspects.

“Nowadays, football is more physical, more about strength and speed, and technical ability can sometimes come second. ‘Barcelona have to change lots of things.

“A club, which I think is the best in the world, can’t have 13 professional players and the rest youngsters.

Not because they don’t deserve to be there, but they have to be competing with the best and with who has to play.

“Every club has 23 players fighting for a place, improving and getting better every day.

“But when they don’t progress, when you think you can always win with your DNA, that’s when you’re mistaken.

“There are lots of good players. We have Messi, who is the number one and is an alien, but he needs help.

“He needs players that improve the team and that get better results.”

The Chilean started 16 times in Barça’s last season domestic league campaign and he was directly involved in 10 goals.