Former Man United great Paul Scholes has revealed the Barcelona team under Pep Guardiola was the best side he ever faced during his long career.
The midfielder enjoyed a hugely successful career at the Manchester club, winning numerous titles including the Champions League.
He however says United could have won more European titles were it not for the brilliance of some European teams, particularly Barcelona.
"We were quite unlucky really. In any other era we might have won four, five, or six European Cups," the Red Devils legend told the A Goal In One Podcast.
"But the teams that were about - you look at Guardiola’s Barcelona team. Jesus, how good were they?!
"You could go right through the team. In midfield, you had Andres Iniesta, Xavi, Sergio Busquets, and Lionel Messi. Henry on the left. Centre halves of Gerard Pique and Carlos Puyol. Just unreal. They’re without a doubt the best team I’ve played against. They’re one of the best teams that has ever been."
Scholes also heaped praise on the Real Madrid side that knocked them out in the 2002/03 Champions League quarterfinals.
"If I go a bit further back I think of the Real Madrid side that we played against," said the 45-year-old.
"We got absolutely battered in the Bernabeu one year. 3-1 it was in the first game but what a team that was. It’s not far away from that Barcelona team.
"They had the Brazilian Ronaldo, Zinedine Zidane, Luis Figo, Redondo was unreal, Raul, Roberto Carlos, Hierro, Iker Casillas in goal, that was a team that was just ridiculous.