Walter Mazzarri and Antonio Conte will lock horns in the Premier League on Saturday.
While Walter Mazzarri does not regard Antonio Conte as a friend, the Watford manager will shake his Chelsea counterpart's hand.
Mazzarri and Conte were fierce rivals in the Serie A, when in charge of Napoli and Juventus respectively.
The Italian pair's relationship became frosty after Mazzarri apparently took exception to what he believed to be Conte imitating his 3-5-2 formation in the race for the Scudetto.
Mazzari and Conte will go head-to-head in the Premier League on Saturday, but the former attempted to play down the rivalry.