Thatâ€™s the view of former Premier League player and current ESPN pundit Steve Nicol.
Courtois has joined Real Madrid with Mateo Kovacic moving to Stamford Bridge on a season-long loan.
Courtois is expected to be Madridâ€™s new No 1 despite Keylor Navas having helped the La Liga side to three successive Champions League titles.
Navas has stated his intentions to remain at the Bernabeu, saying: “Of course, and I say this with force, I have the same desire to leave that I have to die.â€ť
But Nicol, who starred for Liverpool, believes Courtois is an upgrade on the Costa Rican shot-stopper.
â€śReal Madrid havenâ€™t won many La Liga titles recently, but I donâ€™t think itâ€™s because theyâ€™ve had a bad goalkeeper,â€ť Nicol told ESPN FC.
â€śCourtois makes them better because at his best he is a better goalkeeper than Navas.
â€śIf you have an opportunity, regardless of the position, to make your team better and itâ€™s a good deal then it makes absolutely no sense not to do it.
â€śThatâ€™s all theyâ€™ve done here. Navas is a great goalkeeper, theyâ€™ve got an even better goalkeeper in Courtois now but thatâ€™s not the reason theyâ€™ll now win La Liga.â€ť
Following his departure from Chelsea, Courtois wrote a message on Facebook however he later deleted it.
â€śHello CFC Family,â€ť he had wrote. â€śWith these few words I would like to express my heartfelt gratitude for four fantastic years tear have passed.
“Chelsea FC will always have a special place in my heart.
â€śI was only nineteen years old when the club showed a great belief in my abilities. The fact that such a big club was already following me was like a dream come true. The decision to first send me away (to Atletico Madrid) helped me to grow into a goalkeeper fit for Chelsea FC.
â€śWhen I returned, I was very happy to be part of one of the biggest teams in the world. I fulfilled a childhood dream playing in the Premier League, therefore I am really proud that we were able to win two Premier League titles, a League Cup and a FA Cup!
â€śA huge thank you to all my teammates and technical staff over the past four years who I shared this success and amazing moments with, both on and off the pitch.
“The team would never be successful without the help of all the other members who are devoted to the players and the club, such as the medical deportment, kit men and all the others who I canâ€™t thank separately!â€ť