Juventus defender Giorgio Chiellini says AS Roma coach Zdenek Zeman must win silverware to prove his quality.

Chiellini congratulated Zeman for his entertaining brand of football but questioned his lack of honours.

"He has always taught the verb of football and his sides have always played with spectacular style," the centre-back said.

"However, you can only become a great when you win things - it is the same for us players too."