The 24-year-old moved to Stamford Bridge from Everton in January, but injuries limited his impact.
With just a few weeks remaining in the window, the 26-year-old goalkeeper has gone to extreme measures to try and force his current club to make a move.
And Courtois, who returned to preseason training with Chelsea on Monday following his involvement with Belgium at the World Cup, has made his intentions clear to Sarri during talks.
"The only cub who made an offer for me was Barcelona", revealed the player.
The Premier League club are thought to be willing to let him leave, providing they can find a replacement, while Maurizio Sarri said yesterday that he didn't want to keep him at the club if he wasn't fully motivated.
Riyad Mahrez to Manchester City from Leicester.
Hazard and his compatriot, Thibaut Courtois, are both due to return to the club soon and the situation is similar for both - Real Madrid are showing an interest.
This will be his sixth year with the west London side.
Real have bid around £35m for Courtois whose agent, Christophe Henrotay, went public last week calling for Chelsea to allow his client to move.
Alisson from Roma to Liverpool.
Bournemouth will be hoping to wrap up the signing of Colombian defensive midfielder Jefferson Lerma for a club-record fee.
All that remains is for confirmation that Lerma has agreed personal terms, passed a medical and obtained a work permit.
The Telegraph reported earlier that the goalkeeper was missing for the scheduled 4 p.m. training session, which should have marked his return to the club after a post-World Cup holiday.