Now with his actual condition and performance already much reduced it is not too good that he waited too long.
The option for Inter at the moment seems to be lost because Inter are quite disappointed with what Lukaku is doing at the moment and it is evident that Inter are currently looking for several options for new strikers such as Morata who is currently being contested by 3 other Serie A clubs.
On the other hand, Milan also seem to change their path and do not really expect Lukaku back like some previous rumours and currently the choices are only Arab League or Juventus.
He could still be at Chelsea but I'm pretty sure most of what he did at Chelsea was on the bench.
Lukaku fate was very unlucky in this transfer window because previously Inter Milan really wanted Lukaku to return to Inter Milan next season. However, Inter Milan finally withdrew from Lukaku transfer after learning that Lukaku was in contact with Juventus. Ac milan was only present as a cheerleader in Lukaku transfer but they have no serious interest in Lukaku.
Yes, only Juventus remains as a team that wants to get Lukaku in this transfer window. Lukaku is automatically not an option for Pochettino after he said emphatically that Lukaku would not be his priority for next season. Chelsea seems to be having trouble selling Lukaku in this transfer window because Lukaku only wants to stay in Europe, making the situation more complicated because not a single European team is really serious about bringing in Lukaku after Inter milan stopped their intention to buy Lukaku.
Seeing from his condition, he actually decided for it himself so Inter immediately pulled out when they found Lukaku in talks with Juventus.
Now conditions are a little complicated for Lukaku because previously if Inter tried to bring him even with a slightly long negotiation process, but this time the possibility is small after seeing the current conditions.
It only remains to wait whether Chelsea are really serious about bringing Dusan or not because this could be a domino effect for Lukaku too.
But if in the end this fails then the possibility of Lukaku is increasingly difficult to be in European competition, even though it can still be but the possibility of staying at Chelsea with the status of a reserve player is like a certainty.