#7 Walter Mazzarri and Antonio Conte
Walter Mazzarri and Antonio Conte may be Premier League bosses at the moment but their feud goes all the way back to the time they were managers at Napoli and Juventus respectively. The two actually got off on the right foot with Mazzarri all praise for the former Juventus player when he was appointed as manager. However, things soured quickly when Mazzarri accused Conte of stealing his football philosophy. Which philosophy do you ask? The oh-so-successful three at the back.
While Conte claimed it was just a result of having three excellent centre-halves, the former Inter Milan manager refused to believe him. Their personal rivalry extended to their teams when Mazzarri ordered his players to boycott the post-match presentation of the Italian Super Cup in 2012 which saw Juventus lift the trophy after defeating Napoli 4-2 during extra time. The former Napoli manager even said the Bianconeri had an edge over Italian clubs because of their spending capacity.
After a 1-1 draw against Napoli in 2013, Conte went so far as to say, "No, I never spoke with him. Never, never, never. We didn’t even shake hands. I can assure you we didn’t even look at each other. Each to their own bench. It’s better that way." While they have dialled back their disdain for each other, Mazzarri can’t be too happy about Conte sitting at the top of the table with Chelsea and their back-three.