Manchester United are reportedly interested in signing Porto defender Bruno Martins Indi.
Louis van Gaal is believed to have sent scouts to watch the Portuguese side's win against Chelsea in midweek and according to O Jogo, United were keen to check on the progress of Martins Indi.
The Premier League side are reportedly looking to add to their defensive reinforcements after Luke Shaw broke his leg in two places and it is suggested that the Dutch international could fit the bill.
The 23-year-old has made 25 appearances for Porto since joining the club from Feyenoord in 2014, scoring two goals.