Romelu Lukaku probably cannot leave the Blues this summer. Even if he wants a move back to Inter Milan, it just does not look likely to happen. The £97 million price tag placed on the centre-forward is too high a price for any team, never mind Chelsea, to lose profit on. In the world of realities, Marina Granovskaia will not be able to negotiate her way to receiving the same amount that she bought the striker for.
According to La Gazzetta dello Sport (via Football Italia ), Lukaku's former club, Inter Milan, maybe open up to the idea of the Belgian's return. They have not ruled out making a move for the Belgian this summer, and whilst Chelsea fans may lick their lips at this possibility, it probably isn't the wisest move. Quite apart from the fact that Lukaku looks to be a better version of himself towards the end of the season, there is just no way that he leaves the club without some sort of financial gain.
In fact, it doesn't surprise me that a loan move back to Italy might be the only option for Lukaku at this time. With Antonio Rudiger out the door this summer, there's an option that the Nerazzurri can take.