Alvarez is a favourite of Barca coach Tata Martino and expected to sign for the Nou Camp giants in January.
"My friends write to me on Facebook from Colombia and say: 'Is it true that you're going to Barca?' And I say no, they have not told me anything, they are rumors.
"And they tell me: 'But are you saying you could go?'. And I tell them no and they say 'yes'. And I do not know what to say!
"They ask if the stories are true, I say it's not true and they keep telling me it is, it becomes very difficult.
"So the rumours and everything that is being said is difficult."
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