Atletico Madrid have confirmed Nehuen Perez is to link up with the LaLiga side's first team squad.
The Argentinian centre-back moved to Atletico from Argentinos Juniors last July, signing a six-year deal, but rejoined the club on loan.
Atletico, however, are preparing to bring Perez into their first team after the ongoing South American Under-20 Championship.
Diego Simeone's side have struggled with defensive injuries all season, with captain Diego Godin sidelined by a thigh problem.
Godin has also been linked with a move to Serie A side Inter at the end of the season, when his Atletico contract is set to expire.
Atletico signed Alvaro Morata on an 18-month loan from Chelsea earlier this month despite protests against the deal from the club's fans, who called for youngsters to be given a chance instead.
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