Manchester United defender Jonny Evans admits his teammates were hit hard by their Champions League final defeat.
United lost to Barcelona at Wembley.
"That defeat will stick in the lads' heads," said Evans of the 3-1 reverse, when Barca produced a performance the equal of any from a club side in the history of the game.
"These lads have been so successful throughout their careers but they still remember defeats.
"I am sure they will have that at the back of their minds coming into the new season.
"Barcelona have set the standard. They have gone to another level.
"Maybe 10 years ago, when Manchester United went into Europe, there was a gap to bridge and we managed to do it.
"The challenge is there for us again. Hopefully we can get closer to them."
