Borussia Dortmund should strip Germany international Emre Can of the captaincy ahead of their Champions League showdown with Celtic, according to legend Lothar Matthaus.

The Hoops travel to the Westfalenstadion next week for their second game in the new-look competition after getting off to a stunning start with a thumping win over Slovan Bratislava.

But Dortmund were rocked after being slaughtered by Stuttgart in a 5-1 Bundesliga defeat at the weekend.

New manager Nuri Sahin confirmed he would retain Can as captain even though he is now not a regular first choice pick for Dortmund and was benched in the defeat to Stuttgart.

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And Mattheus - the first player to play in five consecutive World Cups and now a top TV pundit - reckons BVB have to make changes soon.

He said: "For me, a captain has to be a regular player.

"It has nothing to do with Emre Can as a person, but I would choose a different player as the captain."

And Dortmund sports director Sebastian Kehl slammed his own players after their weekend loss and urged improvement ahead of tomorrow's derby with Bochum and showdown with Celtic.

He said: "Everyone should take a look at themselves at that. Apart from a small number of players, I didn't see anyone who was in form - or who gave the feeling that they wanted to win the game.

"That was very, very bad. We are very disappointed and really angry. Every player should be really angry too. We lost every 50/50 and were always too late."