"It was important to go top again. The circumstances perhaps weren't the best but in the end we won the match," said Iniesta.
"When you have a chance you have to take advantage of it. I think this victory will give us strength ahead of the match on Wednesday and for the games to come after that."
On two-goal Lionel Messi, he added: "Messi always responds. He never misses and in just a few minutes he can change a game. He's a fundamental player."
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