Courtois's never-ending links with Real Madrid have morphed into one of the most intriguing transfer sagas this summer.
Sarri admitted there was "a little difference, maybe a lot" between the two teams at Wembley but said he had had little time to work with the players, many of whom were given extended holiday after the World Cup.
The new Chelsea boss has had a hard start to life in England, losing the Community Shield to Manchester City on Sunday as well as dealing with ongoing transfer speculation linking a number of his first-team squad with moves away from the club.
"I always told him I'm really happy playing for Chelsea".
Thibaut Courtois remained coy when quizzed about his future at Chelsea FC as he continues to be linked with a transfer to Real Madrid.
David Luiz has urged Courtois and Hazard to stay, while insisting the Blues have enough quality even if the pair leave.
And Willian, who has been with Chelsea since 2013, has now committed his future to the west London club.
Real, who have been chasing Courtois for some time, have made a £35m offer for Courtois, and have been in talks with Chelsea transfer supremo Marina Granovskaia.
Manchester City won the game 2-0.
Thibault Courtois is one of the best goalkeepers in the world and he has just one year left on his contract at Chelsea.
Bournemouth will be hoping to wrap up the signing of Colombian defensive midfielder Jefferson Lerma for a club-record fee.
Leicester announced on Sunday evening that they have struck a deal to sign winger Rachid Ghezzal from Monaco on a four-year deal.