Former Brazil and AC Milan goalkeeper Dida praised Alisson for his improvement, hailing the Roma shot-stopper's confidence and bravery.
Alisson has starred for Roma this season, leading to speculation he could leave the Serie A club, with Real Madrid and Liverpool linked.
Dida, a 2002 World Cup winner with Brazil, was delighted to see how the 25-year-old – his former team-mate at Internacional – had developed.
"Alisson is a great goalkeeper. He is very strong," Dida told Omnisport, speaking courtesy of Hublot.
"He improved so much lately. He is confident and brave. I hope he can perform at his best because he is a great friend of mine.
"I lived with him for two years at Internacional in Porto Alegre. I back him a lot."
"I hope Brazil will perform well. They were great during the qualifiers," he said.
"Tite changed Brazil's style of play. I hope we can do well and win another World Cup."
