The Chelsea and Belgium striker scored 24 goals for Inter Milan last season to lead them to their first Serie A title in 11 years.
The 28-year-old then netted four goals at Euro 2020 as his country reached the quarter-final, before earning a £98million move to Chelsea in August.
He has also scored three goals so far for the European champions, and former AC Milan legend Kaka believes the Belgian has similar characteristics to his former international team-mate, Adriano.
‘Romelu is number one, he reminds me of Adriano at his best – physical strength, intelligence, speed,’ Kaka told Italian publication Gazzetta dello Sport via sempreinter.com.
‘A year ago Milan took the lead [in the title race] after the first derby, then Inter took it back and won deservedly.’
Former Brazil striker Adriano scored 67 goals across two spells at San Siro for Inter, while also netting 27 goals in 48 appearances for Brazil between the turn of the century and 2010.
Brazil striker Adriano
The 39-year-old also enjoyed fine goalscoring spells at Parma, Sao Paulo and in two of his three stints at Flamengo.
Kaka also believes AC Milan have the perfect opportunity to win the Scudetto after finishing as runners-up in 2020-21.
‘I think it could be the right time for Milan,’ Kaka added.
‘They have continuity, while the others have each lost something – Juventus no longer have Ronaldo, Inter will have to spread goals out in the team without Lukaku.
Pioli gave up on Ibra [Ibrahimovic] for a long time [last season]. ‘Conte always had Lukaku available to him.
‘Today Ibra is still there and Giroud has joined, I think and I hope that we can go all the way.’