— Manchester United (@ManUtd) August 20, 2014
The versatile Argentine international, who can operate either at left-back and centre-half, has penned a five-year deal with the Red Devils. He will wear the No.5 shirt at Old Trafford.
The 24-year-old becomes Louis van Gaal’s third major signing of this summer transfer window following the arrival of Luke Shaw and Ander Herrera.
Rojo is likely to make his debut in Sunday’s game against Sunderland.