Manchester United reportedly scouted Portugal international Bruno Fernandes during Sporting Lisbon's 3-1 win over Aves on Saturday night.
Fernandes struck his 28th goal of the season at the weekend, with the 24-year-old enjoying a remarkable campaign for Sporting.
United are said to be at the head of the queue for the attacking midfielder, who is believed to have a release clause of £86m in his current deal.
According to A Bola, the Red Devils sent scouts to watch Fernandes in action at the weekend as they consider a summer move.
The Portuguese joined Sporting from Sampdoria in 2017 and has helped the Green and Whites land two Taca da Liga crowns during the last two campaigns.