Aside from giving up the spot-kick, Luis Enrique felt his team delivered a flawless performance that the fans deserved to witness in the wake of their shock 2-1 LaLiga loss to Alaves.
"We didn't make any mistakes throughout the game, apart from one little one in the first half, where we conceded a penalty. Then the matter was settled," he said.
"It was spectacular from the start. We saw the team and all the fans having fun. It's a good welcome to the Champions League.
"We were very good positionally during the match and we recovered the ball very quickly. That helped everyone to have fun, the players, the coaches and the fans, who deserve it the most.
"We have the fortune of having some fantastic players and they get better with every training session and every match. They're so good with the quality they have, they find solutions when supposedly there's no way through."