The pair were once fierce rivals but decided last season to put an end to the bickering and at least tolerate each other which Ancelotti spoke of whilst promoting his autobiography at Stamford Bridge.
"In Italy, we said plenty of harsh things to one another, we didn't particularly like each other, but ever since I've been in England my view has changed," Ancelotti said.
"He made history at the club where I work, his archive of training has been useful to me more than once, and so he deserves total and rapt attention.
"We called a truce before the first leg of our Champions League match. We met in a corridor at the San Siro and we made a pact: 'No more bickering, no more controversy'.
"When I won the Premier League, he wrote me a text message: 'Champagne.' When he won the Scudetto in Italy, I sent him a message back: 'Champagne, but not too much.' I don't think Jose and I will ever be friends, but now we have a real and reciprocal respect."