Juventus boss Massimiliano Allegri claimed pressure from AC Milan's players persuaded referee Nicola Rizzoli to rule out a Miralem Pjanic goal in his side's controversial 1-0 defeat at San Siro.
Manuel Locatelli's superb second-half strike ultimately secured the win for the hosts, their first over Juventus in Serie A for four years, but the visitors appeared to have reason to be aggrieved.
An offside Medhi Benatia did not seem to be interfering with play when Pjanic's 35-yard, first-half free kick flew in and the goal was originally allowed to stand.
But the decision prompted a storm of protests from the Milan players and after consulting with his assistants, the referee reversed his decision, leaving Allegri less than impressed.