Manchester United boss David Moyes has decided to choose between two midfield signing options.
He is deciding whether or not to make a move for one of the playmakers in January.
Moyes was in attendance at the Vicente Calderon on Wednesday night to watch Koke star in Atletico's 2-0 Champions League victory over Porto.
But United are also tracking Brazilian Ribeiro, who has proclaimed himself as the perfect solution to the champions' lack of midfield creativity.
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