Manchester United watched William Carvalho in action this past weekend, reports ABola.
The Sporting Lisbon midfielder has been monitored by the Red Devils throughout this campaign and it appears that David Moyes wants as much information on the star as possible.
However it remains to be seen as to whether Manchester United will make a move for Carvalho in the summer.
Manchester United fans will be desperate for the club to sign a new midfielder in the summer with the club having a nightmare season.
Moyes' side are currently in seventh place in the Premier League table and have already been eliminated from both the FA Cup and League Cup.
Manchester United are in danger of missing out on Champions League qualification this season as they currently trail rivals Liverpool by 11 points.