The 19-year-old ace – on loan at Serie A strugglers Sassuolo – recently rose to prominence after netting all four goals in his side’s 4-3 win over AC Milan.
His razor-sharp displays are already seeing him being hailed as Italy’s top starlet, with a spot in the senior national side appearing to be a possibility in the not too distant future.
Chelsea and United have been alerted by the striker’s development, and are believed to have had scouts watching him lately.
Both clubs are known to be in the market for attacking additions, with the Red Devils worried about Wayne Rooney’s possible exit and the Blues in need of a top marksman to lead their frontline.
Juve are desperate to keep their man, but a big money offer could be tempting for the club – with members of the Old Lady’s hierarchy having recently hinted that they are unable to compete with English sides on a financial level.
United and Chelsea are already embroiled in a transfer tussle, with Juan Mata rumoured to be on the verge of swapping Stamford Bridge for Old Trafford.