It's plausible that he wasn't discrete about it. Honestly though, you would have thought that the club was properly educating its players about certain rules, especially about integrity and PEDs.
According to Italian outlet La Stampa on Wednesday, that latest piece of off-field drama has dropped in the form of Juventus midfielder Nicolo Fagioli being investigated by the Turin Prosecutor’s Office for illegal online gambling. Gambling and betting is legal in Italy, but that activity suddenly becomes an issue when it is done on an illegal and unauthorized site, something that Fagioli is now being investigated for. The investigation was reportedly started at the end of August, with potential federal laws coming into play if the betting was done through illegal platforms or, potentially, on football contests.
While he could pay a fine of at least €25,000, Fagioli also risks a three-year ban if he is found to have broken any sporting regulations with his betting activity.
So there isn't any mention of football betting though. He could've been doing anything, my assumption is if it's not football related then all he would get is a fine no?