Thibaut Courtois has been talking about the strides he has made early in his career.
Thibaut Courtois is back at Chelsea after three successful seasons on loan at Atletico Madrid, and is more confident than he has ever been.
Quite rightly so, considering the goalkeeper led his side to the La Liga title and Champions League final, as well as starring at the World Cup.
While at times his relationship with his parent club has been questioned, overall the Belgian has no complaints at how his development has been handled.
In an interview with Chelsea's website he is quite frank about where he was before Chelsea, and where he is now:
"When I signed here I had played for just one year in the Belgian league. I wasn’t anybody.
"In the last three years, I have been able to improve myself a lot and make my name in the football world.
‘Now it is up to me to keep working hard here at Chelsea, keep improving myself and helping the team to achieve the things we all want."
He added that the appreciation shown by Chelsea fans when Atletico came to Stamford Bridge last season aided in his desire to return:
"It was so nice to see that the Chelsea supporters appreciated my talent and my work at Atletico, to see them clapping me was quite special and hopefully now I can give them joy by helping the team win games and trophies."
Chelsea have taken a lot of criticism from various quarters from their handling of young players, emphasised by Romelu Lukaku's recent sale.
Yet his steady development and arrival back at the club as an established star, is proof that they can get it right.
Courtois must still dislodge Petr Cech for the number one spot, but even if it is not straight away and he can be patient, it will be a case of if rather than when.
Is Courtois proof Chelsea's system can work, or is he an exception?