Porto midfield schemer Fabio Vieira is being watched by Manchester United.

The 21-year-old has had a standout season for the Portuguese side, with nine assists in 21 appearances.

Record says United are one of ten European giants looking to sign Vieira - with Ralf Rangnick keen to seal his first transfer.

Any move made by United could prompt any of Atletico Madrid, Borussia Dortmund, Saint-Étienne, Real Sociedad, Sassuolo, Rennes or Nimes to launch a bid.

The report also states that United could face a challenge from Vieira's homeland too, with Braga and Salgueiros also interested in acquiring his services.

If a deal for Vieira is completed in January, he could be a potential replacement for wantaway star Jesse Lingard.