Dundee manager Paul Hartley admitted his players were “outclassed” as they were beaten 6-0 by Celtic.
The Dens men lost half-a-dozen goals scored by Tomas Rogic, Leigh Griffiths, Emilio Izaguirre (two), Scott Brown and Nadir Ciftci on a difficult afternoon at Celtic Park.
It could have been even worse yesterday had Dundee goalkeeper Scott Bain not played so well, denying the Hoops regularly with a string of superb stops.
Also, Izaguirre missed a penalty and Ciftci had a goal chalked off as the Dark Blues were pinned back by the champions.
Hartley said: “It was a poor performance not acceptable.
“It was a really bad day.
“I don’t think we feared Celtic going into the game but when Celtic come in for criticism you know they are going to have a reaction.
“So when you come here you need to make sure you stay in the game as long as you can. We didn’t manage to do that.
“Instead, we were really poor and if it wasn’t for our goalkeeper it could have been more, to be honest with you.
“Scott is an outstanding goalkeeper but we gave him too much to do today.
“I felt we were off it all over the park. We had one performer, the goalie, and 10 who were off it.
“We are embarrassed by the performance, that’s for sure, but we have to regroup.
“Overall, we were outclassed it’s simple.”
Dundee number one Bain added: “Not much was said between the lads after the game.
“It was a bit quiet in there, to be honest.
“People are disappointed in themselves.”