Courtois said in a news conference yesterday of Hazard: "He's a wonderful player".
The seven-year deal certainly puts Chelsea in a position of strength which had been lacking with outgoing Courtois.
"Some players take more time to adapt than others", he said. "If he ends up here one day, that would be brilliant".
The Merseyside club announced shortly before the deadline that Brazilian Bernard had signed a four-year deal at Goodison Park after moving from Shakhtar Donestsk on a free transfer.
Despite that, he has maintained regular playing time and has accumulated over 100 appearances during his three years with Real, including in the Champions League, which Real Madrid have won every season since Kovacic joined.
The Blues faced a race against time as to sign the young global before the Premier League transfer window closes on Thursday at 18:00 CEST - tasked with convincing the shot-stopper to move to England, despite Kepa having just renewed his contract.
"Everyone who knows me knows how hard I've worked to get here, and I'm proud to be at the best club in the world".
"I want to continue to add success to this club's history". "I just hope I can adjust and adapt as soon as possible but we are all different. I am a player who demands a lot from myself". When there was a firm offer on the table, I was in no doubt.
"Subject to the completion of the deal Mateo Kovacic will join the Blues on a season-long loan".
Sarri is also getting Kovacic, who had not played much with Madrid since joining the club in 2015 and had been seeking a transfer.
I was only 19 years old when the club showed a great belief in my abilities.
And the 23-year-old revealed that his fellow Spaniards provided him with some rave reviews of life at Chelsea, convincing him to make the move. Naturally he is happy for me and this move.