On 25 July 2014, Pereyra officially signed for, at the time, three-time defending Serie A champions Juventus on a season-long loan deal from Udinese worth €1.5 million, with the option to sign the player outright at the conclusion of the 2014–15 Serie A campaign for an additional €14 million. On the same day, Pereyra appeared for his club in their first friendly match of the season against Lucento. On 23 August 2014, he featured for Juventus in the annual Trofeo TIM. Pereyra capitalised on Francesco Magnanelli’s failed clearance to sidefoot home from just outside the six-yard box.