Manchester United have completed the £19m signing of Porto defender Diogo Dalot, described by Jose Mourinho as the "best young full-back in Europe".
The 19-year-old, who has made seven senior appearances, has signed a five-year deal at United.
Dalot has represented Portugal from under-15 to under-21 level and made his Porto debut in October.
"The chance of coming to the biggest club in the world is something I just couldn't turn down," said Dalot.
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