That would leave Sarri in a hard position at Chelsea, especially with three weeks until this year's earlier Deadline Day, which will commence before the first weekend of the new campaign.
'He knows the fans love him and he's a player we love to play with.
Courtois is completely different and as developments this week have highlighted, the realisation of the importance of the goalkeeping position and not having a world class player to fill it has caused a mild form of panic to set in among fans.
The club are said to have meetings planned to discuss moving forward for the 27-year-old. Sarri says he would like more quality in the midfield area to fit his preferred approach, while adding that he could also adapt to the players he now has in the squad.
'I won't lie, I speak to him (Hazard) often.
'Clearly we would always like to keep all strongest players this is what any manager wants to do and any club wants to do but we will have to see how transfer market goes over next few days.
"I spoke with the football club and said ideally I think that a pinch of quality is lacking in our central midfield for a certain kind of play, otherwise they are at a very high level", he said.
The Rossoneri were banned from next season's Europa League due to breaches of Financial Fair Play regulations, and they may need to sell key players to ensure that the same thing does not happen again.
But talks are ongoing over a transfer to the Bernabeu for the Belgium intentional.
"My goal is to have fun and be competitive in all the competitions until the end", Sarri told a news conference on Wednesday.
"Well, for me this is a hard challenge, but a fascinating one", said Sarri.
On Cahill, Sarri said: "I think he can still give us a lot".
Italian website Calcio Mercato, as quoted by The Sun, is reporting that the Blues have already turned down a £107m offer for the Belgium global from the Champions League winners. "I hope the quality of the players will allow me to have the results".