The playmaker won plenty of admirers at Euro 2012 thanks to a series of impressive performances as Portugal made it to the semi-finals before exiting at the hands of eventual winners Spain.
United have been keen on adding to their midfield ranks for some time now and appear to have turned their attention to Moutinho having been frustrated in their pursuit of Tottenham’s Luka Modric, who they believe is over-priced at around £35 million.
The Times report that United have made contact with Porto over the potential sale of Moutinho, who joined the Portuguese champions from Sporting Lisbon two years ago.
His current club are believed to be holding out for around £26 million while they are said to be not overly keen on selling up, especially with leading striker Hulk said to be heading to the Premier League to join up with Chelsea.
United’s bid is likely to be turned down, and they may face competition form Spurs, who ironically will go after Moutinho if Modric decides to leave White Hart Lane.
New Lilywhites boss Andre Villas-Boas worked with Moutinho at Porto back in 2010 when he guided the club to a historic treble, with Moutinho saying earlier this week that he would jump at the chance to work with his former boss if the opportunity arose.
Villas-Boas is said to be keen on landing his former charge if and when Modric decides to leave, will use money raised from selling the Croatian to finance any deal for the Portuguese international.