Paris St Germain's Zlatan Ibrahimovic addresses at a news conference at the Parc des Princes stadium in Paris, April 1, 2014. REUTERS/Gonzalo Fuentes/File Photo
(Reuters) - Manchester United's marquee signing Zlatan Ibrahimovic will face the biggest challenge of his glittering career in the Premier League this season, manager Jose Mourinho has said.
Striker Ibrahimovic, who completed his move to Old Trafford last week, has won titles in four different countries, including at Inter Milan, where he played under Mourinho.
