EXCLUSIVE from Graeme BaileyManchester United are interested in signing Antonio Silva from Benfica in the summer transfer window, HITC understands. Sources have told HITC that Manchester United were once again watching Benfica at the weekend. Manchester United scouting Benfica defender Antonio SilvaUnited were represented at Benfica’s comfortable 4-0 success over Portimonense in the Portuguese Primeira Liga this past Sunday. HITC understands that the main reason for United’s visit was to continue their checks on highly-rated central defender Antonio Silva – a player very high on the radar of t…