Barry Smith has demanded his Dundee players learn from their mistakes after their 3-0 derby defeat to city rivals Dundee United at Tannadice.
The Dark Blues are yet to score an SPL goal so far this term with their sole point coming in the 0-0 draw with Kilmarnock on the opening day of the campaign.
Nicky Riley forced United keeper Radoslaw Cierzniak into a double save after four minutes before the hosts opened the scoring through Gavin Gunning.
A double from Johnny Russell left Smith’s men empty-handed and he was disappointed with his team’s display.
He said: "I thought we started very well but the problem is we are conceding goals that you can't afford to do at this level.
"We need to show more spirit as we had an incredible following from the fans and the players should have a look at what it means to play for this club.
"The story of the past couple of games has been that we haven't taken our chances and then the other team has gone up the park and scored."
Captain Stephen O’Donnell was sent off along with United forward Johnny Russell.
Smith didn’t feel either player deserved to be sent off, adding: "I don't think either were sendings off. I think the referee will have a look at it and realise that it was just a coming together and hopefully they will both be rescinded.
"I don't think we would have to appeal if the referee says he has made a mistake. When he watches it again he will maybe think he reacted a bit too quickly but in the heat of the moment you can understand why he did."