Spite can be a great motivator in life, even when there are millions of pounds at stake, and Chelsea are apparently going to prove that as correct.

Back in 2011, The Blues paid Belgian outfit Anderlecht £18 million for the then teenage striker, only to sell him on for a further £10m after three years of loan spells and 33 goalless appearances.

However, now that he has matured into the player that everyone hoped he would be, bringing him back could set the west Londoner's back an eye-watering £70m, though the price tag isn't thought to be enough to put them off.

With Diego Costa's future at the club in doubt, it'll be no surprise to see Chelsea dip into the transfer market for a new striker during the summer transfer window.

On the pitch, the team looks more harmonious that it has for years, but stories linking their top scorer with an exit at the end of the season are refusing to go away.

And while Lukaku's Premier League goal record would suggest that that he would be an able replacement for the Spanish international, there's another reason why the Blues are so desperate to bring him back on board.

Michael Emenalo had a frosty relationship with Jose Mourinho during their time working together, but The Sun is now reporting that the former wants to re-sign the Belgian star in order to prove that the Special One was wrong to let him go in the first place.

Mourinho also allowed David Luiz and Kevin De Bruyne to leave Stamford Bridge, and though the former is back at the club, the latter is proving that he should have been kept around as his performances at Manchester City have shown.

Luiz's return has seen him looking better than ever, and he's now one of the first names on Antonio Conte's team sheet.

Mourinho, of course, has his own similar frustrations at Manchester United. He recently bemoaned the fact that his predecessor Louis van Gaal sold Danny Welbeck, Angel Di Maria and Javier Hernandez during his ill-fated reign.

Emanalo reportedly still feels protective over Lukaku and wants nothing more than to see him become a success in London despite the economics of the deal being in disarray.