The 18 year-old is emerging as one of the hottest breakout talents in Ligue 1 this season.
His impact has brought him to the attention of PSG chiefs, while Juve are weighing up a January move for the teen.
Juve GM Damien Comolli rates Bouaddi highly and knows LOSC won't consider offers for less than €30m for the youngster.
Agent Oscar Damiani recently said of Bouaddi: "We're talking about an excellent player who has been a regular starter in Ligue 1 and the Europa League for some time, despite his young age.
"He's a central midfielder skilled in both phases of play and possesses great athleticism. He also boasts decent technical ability. He would certainly be an interesting addition."