You're right. Roma is very lucky to sign a top striker like Lukaku. He is actually a sharp striker but he needs a motivation and support to play with his best. It is something he can't get in Chelsea. That's why he got difficulty to play with his best in Chelsea. Besides in Chelsea, he also ever played in Inter Milan in the previous season. He played quite well in Inter Milan, sadly Inter Milan doesn't want to sign him permanently. Now, he is a part of AS Roma squad, I hope he can be a player of AS Roma permanently. I don't expect he returns to Chelsea.
I think in the match against Udinese, Lukaku will contribute well again. He must do his best to score goals in the next match. So, AS Roma can be in the top 5 of Serie A standings. It is very possible that AS Roma can finish in the UCL zone this season. AC Milan and Napoli look very unstable, they are often defeated by small teams.
He had to reunite with Jose Mourinho after the time they had together at Manchester United. It's a chance for him, at least he should be Impressing the fans and the special one ( Jose Mourinho )
Thomas Tuchel made life difficult for him as a Chelsea player, he barely had a good game time to showcase himself. At Inter Milan, he had a good time and the fans loved him. I don't really know what transpired between the fans and also the player. He was also rejected by his so called best friend he once also defended on the pitch. ( Larturo Martinez )
Romelu Lukaku had a great international break, he scored four goals to secure the top spot! Still on, against Udinese, he will still be amongst the list of players to score!