The 28-year-old is currently away at AFCON with Morocco, completing the full 90 minutes as his side beat Cameroon 2-0 on Friday (January 9).
Mazraoui has been in and out of the Man United squad due to a couple of injury issues, starting just six of his nine Premier League games.
According to Italian outlet Gazzetto dello Sport, Juventus are keen on adding the versatile defender to their squad this month.
It’s understood that Juve are planning a busy January transfer window, with Liverpool’s Federico Chiesa and Atalanta's Daniel Maldini potential attacking options.