Barcelona missed two penalties before beating Cornella after extra-time in the Copa del Rey on Thursday as they flirted with an early exit.
After the game, Ronald Koeman was furious with the penalty misses and on Saturday he was still raging at his side's lack of effectivity from the spot.
"We're analysing the issue with penalties because we've taken 12 this season and have missed seven, including the Supercopa shoot-out," he said in a press conference.
"That's a lot. It's too many. It's not acceptable. If Leo (Messi) is not playing, who's the No.1 taker, we need other players with the quality to score penalties.
"We've been working on them over the last two days. You can train for them just like you practice free-kicks. Of course, it's not the same in training as in a game when you're behind, but there are no fans, so there's no pressure."
With Messi suspended against Elche, Koeman explained the process for choosing who will take a penalty if Barça get one on Sunday.
"We will pick two players in the meeting in the morning," he said. "The final decision is with the captain, though."
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