Former Borussia Dortmund striker Karl-Heinz Riedle says Ousmane Dembele should be banned.

Dembele went on strike and refused to train with Dortmund until he sealed his dream move to Barcelona.

"[He made a] massive impact, we knew it was difficult to keep him, [but] he wanted to play for Barcelona," Riedle told TV station Omnisport.

"I didn't like how it went, how he pressured it's a joke. You should be banned for doing like this."

Dembele has made just three appearances for Barcelona as he is currently out of action with a hamstring injury.