Joao Moutinho is reportedly being lined up for a transfer by Manchester United as Monaco look to free up their wage bill, Metro reports.
Also a target for Arsenal and Chelsea, the 28-year-old is rumoured to be interested in making a comeback for Porto where he already featured for three seasons between 2010 and 2013.
Meanwhile, the Red Devils have completed the signing of 21-year-old Memphis Depay who signed a four-year contract with the club.
"This is a dream come true for me," the player told the club's official website.
"To play for the biggest club in the world and also to have the chance to work with someone who I believe is the best manager in the world, Louis van Gaal.
"I have great belief in my ability and I work hard to strive to achieve my dreams.
"I have been at PSV Eindhoven since I was 12 years old and I would like to thank them for everything.
"It was a great moment when we won the league and I was so happy to be part of that. This is now a new chapter in my life and one that I am looking forward to."