so who is this kid :
all tier 1 sources confirming this
https://www.bbc.com/sport/football/44297187
MANCHESTER, England -- Manchester United are closing in on Porto's Portugal Under-21 defender Diogo Dalot, sources have told ESPN FC.
Jose Mourinho is hopeful of concluding a deal for the full-back, who has started just five senior games for his club.
Sources have told ESPN FC United scouts watched the 19-year-old in Porto's 0-0 draw with Liverpool at Anfield in the Champions League in March.
He impressed enough for United to consider activating the teenager's €20 million buy-out clause.
Dalot, who has already turned down an approach from Valencia, can play at right-back and left-back and would offer cover for Antonio Valencia and Ashley Young on both sides of Mourinho's defence.
all tier 1 sources confirming this
https://www.bbc.com/sport/football/44297187