King feels Kaboul is as good as any defender in Europe.
He explained to the Daily Mail: "As a defender, you’re continually learning. You will make mistakes because that is the nature of the position and they will cost you goals. It’s a question of how quickly you eliminate them.
"When Younes Kaboul came to Spurs he had everything, but he just needed to play and learn, get his head around what it takes to be a top defender. Now he’s one of the best.
"Sometimes you can do too much. Sometimes, for a centre half, less is best. You win the ball and you keep it simple. Some players win the ball and want to run out with it when there’s a pass on and they lose the ball. It’s just something you learn as you grow up."