The Manchester United forward is entering his second season at Old Trafford after completing a sensational £75million transfer from Everton last summer.
Although he has scored 31 goals in all competitions since making his move, fans remain sceptical about the Belgium international.
But his recent comments to Italian journalists will surely leave fans concerned after admitting he hopes to move to Italy at some point during his career.
“Juve have a great project in place and they just keep going. Every year they try to get stronger,” Lukaku told La Gazzetta dello Sport.
“Without doubt, Juve are one of the two-three best teams in Europe. They’ve got a great Coach on the bench and extraordinary players in every area of the team.
“Cristiano Ronaldo stands out, but watch out for the others too. Paulo Dybala is already impressive and getting stronger, while I love Douglas Costa. He’s an exceptional signing and his career shows he always makes the difference.”
The Red Devils will play the Old Lady twice in the space of a fortnight in their Champions League group, with Ronaldo set to return to Old Trafford to face his former side.
After thrashing Young Boys but then drawing with Valencia, progress is not assured by any stretch for Mourinho’s men.
Lukaku added: “It’s a tough group, but obviously Manchester United want to finish on top.”