A rare error from Reina gifted Arsenal a last minute equaliser on Sunday but Carra was quick to leap to the defence of the popular custodian.
"Pepe is the best 'keeper in the world, there is no doubt about that. He was our best player last year," said the vice-captain.
"We all make mistakes and we don't have a problem with him. I'd like to see the goal again, because I know goalkeepers are protected so a lot of times you get a foul for that.
"Ask any team, when you concede a late goal it's disappointing, especially given the way we played."