Barca have set up a title playoff with Atletico Madrid after drawing at Elche yesterday.
"We failed as a group, as a team, at specific moments," said Iniesta.
"Sometimes things don't go the way you want, not because you don't want them to, but because they don't work out, because it's not right, because of other circumstances; but that's the way it goes. Changes are always needed, regardless of whether you win titles or not."
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