By Tom Blow Jorge Mendes has dropped a hint that Joao Neves, who is a transfer target for Manchester United, could leave Benfica this summer. Neves, 19, is one of European football’s most exciting young midfielders. The Portuguese talent broke into Benfica’s starting XI last season and helped them win the league title. He’s been named as the Primeira Liga’s Midfielder of the Month three times this term. Neves has already played for Portugal’s senior team to leave United interested. It’s believed Sir Jim Ratcliffe, who will take charge of football operations at Old Trafford once his takeover is…