Beretta's team faces Milan this weekend and he said: "They are favourite for the title and it will be really difficult against them.
"Right now they have found the perfect balance and have great enthusiasm, we will have to play a game at really high tempo in order to stop them."
"Udinese play the best football at the moment. It is a team which was built to last and will no doubt improve with time.
"Roma will come out from their crisis and there is no better Coach than Luciano Spalletti for this job."