Arsenal manager Arsene Wenger was left to bemoan his side's finishing after they could only draw 1-1 with Atletico Madrid despite the Spanish side playing 80 minutes with 10 men.
Alexandre Lacazette gave Arsenal the lead just after the hour mark but Antoine Griezmann equalised late on after the Gunners fluffed a number of chances.
Goalkeeper Jan Oblak made a number of fine saves to add to the poor finishing after Sime Vrsaljko was dismissed in the 10th minute,
"We produced a performance we wanted to produce, but the result is not in line with the performance," he said.
"We can only look at ourselves on tonight's result because 1-0 is a perfect result at home. It was down to us after that not to make a mistake.
"We had 20 shots on goal, we have seen that against Manchester United (earlier in the season), where we had 33 shots on goal and lost the game. It's a story we've seen before.
"For us the task is clear. But of course you come out tonight with a bitter taste, because we had the chances to be in the final tonight.
"That's where the regret is. We were not clinical enough and unfortunately we gave a goal away which puts us in a very difficult position."