Chelsea signed Courtois , 20 , a highly rated goalkeeper , from Racing Genk in 2011 as a long - term replacement for Petr Cech .
Goalkeeper was immediately loaned out to the Spanish side .
Chelsea signed Courtois , 20 , a highly rated goalkeeper , from Racing Genk in 2011 as a long - term replacement for Petr Cech and he was immediately loaned out to the Spanish side .