United made inquiries from the Uruguay international last summer before an injury in August ruled him out for the first half of the season.
Araujo has only just returned to action for Barcelona and Sport say United remain interested.
It has been suggested that Barca want €50 million for Araujo, who confirmed last week that talks over a new contract were underway.
Meanwhile, Araujo's agent this week confirmed a move from Juventus for his client.
Andres Espinosa told Mundo Deportivo: “He received several offers in January, the most important of which was from the Bianconeri.
“But he has not made a final decision yet because he gives priority to the Blaugrana.”
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