The Tottenham Hotspur defender believes that his club teammate is equal to the 2008 Ballon d'Or recipient on the dead ball.
The France international told L'Equipe: "Gareth Bale is working a lot on free kicks during training sessions. There are only two players in the world that can kick them that way, Cristiano Ronaldo and him.
"The ball comes back down so quickly, for keepers it is difficult because the trajectory is very difficult to read."
Bale scored two goals from free kicks during Spurs' 2-1 win over Lyon in the Europa League on Thursday.