The France captain believes his teammate is emerging as among the best defenders in the world.
"During the Euros, we evolved with various central defenders. In all these games, there was Laurent Koscielny who has always played. He turned a corner at the Euros.
"He's played some beautiful seasons in the Premier League. Sometimes we forget to report this in France.
"He's a safe bet, a player who is exemplary. He brings all his qualities to Team France. We can rely on him."