AC Milan coach Massimiliano Allegri has labelled Real Madrid boss Jose Mourinho "pathetic" and "insecure".
Allegri, who led Milan in his first season in charge to their first scudetto since 2004, was asked to give his opinion on rival coaches on TV show Le Iene.
When questioned about former Inter Milan boss Mourinho, he said: "Every now and then he (Mourinho) is pathetic.
"He continuously repeats the same things and it becomes banal.
"I think he is very talented but his arrogance hides insecurity."
In two years at Inter, Mourinho won the Champions League and successive Serie A titles before moving to Madrid.
The Portuguese was recently given a five-match ban by UEFA for implying Barcelona are given special treatment when the Catalan club beat Madrid in the Champions League this season.
Allegri is the latest in a long line of fellow coaches to give Mourinho a less than glowing reference.
Guus Hiddink recently called on him to apologise for his behaviour surrounding the Barca tie, while the Portuguese has had a long-running feud with Rafa Benitez and former Chelsea boss Claudio Ranieri.