I never met him or played against him. He reported late for Chelsea duty after the World Cup.
The former Napoli manager was also asked whether he found the reason for Willian's tardiness unusual and he was forthright with his response.
Belgium goalkeeper Courtois, 26, has been linked with Real Madrid this summer.
"I want to speak to him before I answer these questions", said Sarri (via the Independent). "It was a very positive conversation and I am very happy about it".
"I hope I have clarified the matter and any possible misunderstanding". "It's very important for us to keep the top players".
Sarri's men don't have long to ponder the loss in Ireland, for they now shift their focus to Sunday's Community Shield with Manchester City.
Willian has won two Premier League titles, an FA Cup and a League Cup during his time in England.
Batshuayi is expected to hold talks with Sarri before making any decision on his future, and would not be short of suitors after impressing for Borussia Dortmund last season. Batshuayi has welcomed Sarri's confidence and is now ready to commit to Stamford Bridge outfit for the coming season.
"He will stay with us for all the season".