Barcelona expect Manchester City to prove formidable Champions League opponents with Pep Guardiola at the helm.
The former Barca boss takes his City side to the Nou Camp on Wednesday for the first of two eagerly-anticipated meetings between the clubs in Group C of this season's competition.
Barca were not overly troubled as they beat City at the last 16 stage in both 2014 and 2015, winning all four matches.
But the arrival of the revered Guardiola could take City to a different level and Barca know full well what their former hero is capable of.
Guardiola won 14 trophies, including two Champions Leagues and three LaLiga titles, during a glorious four-year spell in charge of the Catalan giants.
"We have already said how difficult this game is going to be, not only because of the quality and high class of their players individually, but as a team," said Barca's current manager Luis Enrique.
"You can already see, at the beginning of the Premier League, many differences compared to previous seasons.
"You can already see the hands of Guardiola and I am sure the team will keep improving. They play very attractive football.
"For us it is a great challenge and not only because we are trying to get first place in the group. It is Man City led by Pep. We know it is going to be more difficult than previous seasons."
Long-serving defender Gerard Pique was also full of praise for his old manager.
"Guardiola made a mark on all of us one way or another," said the former Manchester United player.
"There was a before and after and we understand football in a different way since he was here.
"I can only praise a coach that gave us so much.
"It'll be a challenge for us because it's a team that plays in a very similar way to us. They'll pressure us a lot high up and it will be hard for us to keep the ball."
Guardiola, who also enjoyed a successful playing career at the Nou Camp, left the club in 2012 and has since had three years in charge of Bayern Munich.
Although Barca still play the fluid football of the Guardiola era, Pique believes the team has moved on - after all they won the Champions League again in 2015 and are the reigning Spanish title-holders.
