Chelsea boss Thomas Tuchel says he has no doubts signing Pierre-Emerick Aubameyang.

The former Arsenal captain arrived on deadline day from Barcelona.

Tuchel said: "Hopefully he can be that good again, we know what we get and he was keen to get back to the Premier League and we are happy to make it happen. He delivers goals and speed and work rate against the ball so it's a big package he can bring to our group.

"At the moment he cannot train and we need to get him a mask to protect his jaw and then we can start from next week."

On reports of Aubameyang's ill-discipline at Arsenal, Tuchel spoke about their time together at Borussia Dortmund: "There was nothing big. He has a bit of a problem with his time but he never missed a meeting. Sometimes in the 60 minutes before training it is a struggle for him and it may be 59 or 58 minutes.

"He was always positive and he never missed training, he was always happy and in a good state of mind and it impacts the group in a positive way, this is how I remember Auba and this is what we expect from him."