The worst-ever home defeats of Napoli, Milan, Juve, Roma, Inter and Lazio — 0–4. Not since 1997 had Napoli been thrashed at home by such a heavy margin. Despite Milan’s recent mediocre form, despite Napoli’s breathtaking ascent to the summit of Serie A, Rafael Leao and Brahim Diaz combined to punish Neapolitan complacency with four brilliant goals. The stench of the Devil had…