Fernando Torres said he endured "among the worst" days in his career after he was sent off in a 2-1 defeat to Barcelona in the Champions League on Tuesday.

Torres gave Atletico Madrid an early lead with a goal in the 25th minute, but he was sent off 10 minutes later with his second yellow card of the match.

With Atleti reduced to 10 men, Barcelona was able to attack repeatedly without a real threat on the counter.

Torres said in the mixed zone after the game: "It was a complicated day. If not the worst day, probably among the worst in my career."

"I am sad to have left the team with 10. In a way I feel responsible for the team not winning. I am certain that with 11 it would have been totally different.

"But I am proud to play in this team. The result is not all bad. At the Calderon, anything is possible."