Rafael is being chased by several teams across Europe, but barely featured for United last season as Louis van Gaal was not convinced by his reliability in the treatment room or on the pitch. Antonio Valencia was used as his replacement for much of the season, and although displaying defensive discipline, he failed to offer any constructive threat in attack.
Darmian should offer an improvement in both respects after an impressive couple of seasons for Torino, and United have beaten reported interest from Bayern Munich for the player.
This should signal the end of United's search for reinforcements at right-back having been previously linked with moves for Seamus Coleman, Dani Alves and Nathaniel Clyne. United remain interested in Morgan Schneiderlin, Sergio Ramos and Bastian Schweinsteiger.