Eden Hazard's importance to Chelsea has never been clearer than this season.
The Blues haven't truly come into their own under Maurizio Sarri, but their finest moments have come when Hazard has been at his best and he has become a central figure at Stamford Bridge.
Amid the struggles of Alvaro Morata and Olivier Giroud, Hazard has even been used as a false nine, contributing 13 goals and 10 assists so far.
It must be wondered where Chelsea would be in the Premier League standings without their star man as Arsenal and Manchester United chase after their top four placing.
So, there's plenty of reason to be worried if Chelsea were to lose Hazard, an increasingly likely scenario as his contract continues to run out in west London.
Rumours about Hazard
Hazard has just over a year remaining on his current deal and has done little to quell Real Madrid rumours with his comments in the media.
As a result, the Spanish giants have emerged as the most likely suitors and if Hazard can't agree a new deal at Chelsea, they might be encouraged to make a move in the summer.
It's a situation with many moving parts and one that Belgian football expert Kristof Terreur has sought to analyse during an appearance on Sky Sports' Transfer Talk Podcast.
Belgian football expert speaks out
Terreur proceeded to explain: "He has rejected two contract offers so far and says that he doesn't want to sign right now.
"That means he is waiting for something and that something means just one thing, Real Madrid.
"Real Madrid are still interested as far as I know, but they are still yet to make their move.
"They don't have a personal agreement with him at this point, they don't have an agreement with Chelsea and they haven't even made the phone call like they did last summer.
"When they called last summer, Marina Granovskaia said that he wasn't for sale and Real respected that.
"But they might come back in again as they need to strengthen their squad after this season and it is easier to get players with just over a year left on a contract."
Pretty major stuff and it doesn't make good reading for Chelsea.
It seems Hazard has absolutely no intention of extending his stay at Stamford Bridge, a promise reiterated by the fact he has already turned down two offers.
As a result, the clock will be ticking for Chelsea to negotiate a deal with Real Madrid or face losing one of Europe's finest players for a minimal fee.
Hazard has proven somewhat unpredictable in the past, however, so there is still hope that the 28-year-old could commit his future to Chelsea at the last moment.
At the moment, though, all signs point towards Madrid.
Do you think Hazard will leave Chelsea this summer? Have your say in the comments section below.