Chelsea boss Thomas Tuchel has welcomed new signing Kalidou Koulibaly.

Tuchel discussed the former Napoli defender after victory over Club America in Las Vegas.

He said, "He brings experience, quality, top defending, quality, height, everything we're looking for to play a back three of back four. It's a brilliant signing, another brilliant signing for us, and we hope that he can show his quality as soon as possible.

"He is now training outside after he arrived yesterday, and we've very happy. He knows some of the players - he plays with Edou with the national team and knows Jorgi from Napoli - so I think from this side, it will be quick that he feels welcome in the group. It's a nice group, and everyone is happy he is with us now.

"There were always rumours about him leaving Napoli, and it was always super difficult – and in the end impossible – to get him because he was a key player. It's nice he takes the challenge right now, and we have Thiago Silva, who is even older and super experienced and still at the peak of his game. We hope Kalidou can do the same and play for many years for us. He is totally fit and ready for the challenge, and he needs to be because we need him in top shape."

Ben Chilwell made a playing after last season's injury frustrations and Tuchel also said: "We are super happy that he's back, and you can see it's a difference from training to the game, and he will take his time. He will get this time because he deserves it. We will support him on his way back, and it was good for him. I'm happy nobody is injured after a physical game and physical two weeks. Same for Chilly. I'm happy that he's back."