The 24-year-old’s former club Sporting Lisbon had agreed a deal with the Premier League giants for the sale of the Argentine international on Tuesday. The deal was subjected to medical and agreement of personal terms.
Rojo was a star player for his national side during the 2014 FIFA World Cup where they lost to Germany in the finals. He can play as a centre-back or a left-back. Louis van Gaal is likely to use him as a left centre-back in his three man defence.