According to Il Corriere di Torino, Juventus in the summer rejected an offer about €30m coming from Atletico Madrid. On 20th April the Italian club signed him definitively from Boca junior for €14m. Juve have also been working for some time, to persuade the Argentinean club to give up on the 50% of the possible future resale of Bentancur, in face of a financial compensation.
Source: transfermarketweb.com