"We are undergoing a major change and we cannot be expected to start winning straight away," said Bonucci.
Monday 26 March 2018 23:43, UK
England's young players are better-equipped to perform on the international stage than Italy's due to their Premier League experience, says Leonardo Bonucci.
Italy, who failed to qualify for this summer's World Cup in Russia, take on England in a friendly at Wembley on Tuesday as their opponents prepare for the tournament.
Bonucci, who plays for AC Milan, has praised the know-how of Gareth Southgate's youthful squad and has warned supporters this Italy side needs time to rebuild into a winning team.
"We are playing against a team that managed to undergo change very well. They are a very talented group of young players who have a lot of international experience," said Bonucci.
"We have many young players who have less international experience. Also the level of Serie A: we play less in Europe and get less experience than the Premier League.
"We need enthusiasm but we need to see things for what they are. We are undergoing a major change and we cannot be expected to start winning straight away. We have the possibility to create problems for this English team.
"We have a much younger team with not much international experience. You cannot compare our players born in 1993, 1994, 1995, 1996, 1997 compared to the England players born in the same years.
"These friendlies are useful for the younger players to manage games. People need to understand that patience is the key. We need to let young players grow and hopefully they will take us back to the Italy we were used to."
Interim Italy boss Luigi Di Biagio anticipates his injury-hit squad to face a tough task in London on Tuesday evening, following their 2-0 defeat to Argentina at the Etihad last week.
"England have about five top level players who can easily hurt us," said Di Biagio, whose Italy U21 side eliminated Southgate's England U21 team from the 2015 European Championships.
"Some players pick up knocks [against Argentina]. It will be at the very least three or four changes."