Emerson Palmieri is delighted with his move to Chelsea.
He told chelseafc.com: "Toni and I played for a couple of years together at Roma and they were great years. All I can say about him is that he is an extraordinary guy and a great player, and he has already shown that here at Chelsea, so I could not be happier to be back alongside him.
"I had already spoken with him twice last week and today as well. When I arrived here in London, he was the first person I sent a message to say that I was in the house."
Palmieri admits he expects to improve under manager Antonio Conte.
"I learned so much in Italy. Before I went there I used to be a player who just dribbled and shot at goal but what I saw there was that the tactical game can really help your performance. So now I am a better player and I think in some way that is because I managed to combine the two games, Italian and Brazilian.
"Now I am definitely going to improve here at Chelsea under Antonio Conte. He is someone who has already shown that he is a great coach and everyone who plays with him improves, so I am coming to Chelsea with this perspective, that I am going to be playing with one of the best coaches in the world and I am going to get better."