MUNICH -- Jose Mourinho has warned Manchester United face a "difficult" season if executive vice-chairman Ed Woodward does not bring in new faces before the transfer deadline.
Sources have told ESPN FC that Bayern Munich's Jerome Boateng has moved up the list of targets as United look to secure a centre-back before Thursday's cut-off.
Speaking before United's 1-0 defeat to Bayern on Sunday night, the United manager admitted his concern for the coming campaign if his squad is not bolstered before the Premier League kicks off with Leicester's visit to Old Trafford on Friday.
"The other clubs that compete with us are really strong or they have already fantastic squads like Chelsea, Spurs, City, or they are investing massively like for example Liverpool buying everything and everybody," Mourinho told MUTV.