Real Madrid shot-stopper Thibaut Courtois is the best goalkeeper in the world, according to Belgium coach Roberto Martinez.

Courtois was dropped to the bench for Real Madrid's 2-1 win over Deportivo Alaves in LaLiga on Saturday amid criticism of his performances.

However, his international boss Martinez labelled the 27-year-old the world's best despite admitting the goalkeeper was going through a "difficult period".

"Thibaut is for me the best goalkeeper in the world, as he showed at the [2018] World Cup," Martinez said on Saturday.