The pair played together last season before Barragan's departure over the summer.
The veteran defender said: “Emerson is a very good footballer, he's young, they have a right-back for a while. Also with (Martin) Montoya. I think the right side has been covered very well. I am sure that when everything returns to normal, the position will be strong."
Regarding the possibilities of the Brazilian joining Barcelona, which hold his registration in co-ownership, Barragan added: “The games will decree that. He is showing a good level, the Primera is very demanding.
"Like Barcelona we talk about something else, like another planet. But he has possibilities, qualities, he will determine where his ceiling is."
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