LEE Johnson said Millwall were "difficult to break down" and a "potent" attacking threat after watching his Bristol City side lose 2-1 at home to the Lions on Tuesday night.
Johnson also believes Jed Wallace is one of the best players in the league after the Millwall attacker scored one and set up Jake Cooper for another with a free-kick, before the Robins pulled a goal back through Callum O'Dowda late on.
"They set up well against us, got their goal," Johnson said. "They were very difficult to break down and were potent and dangerous on the counter.
"They've got players like Wallace, who I think is one of the best players in the division. He's very bright and lively on that counter.
"The last 15 minutes we did give it a right go and I think that shows the spirit but it was too little, too late."
Wallace's goal seemed to deceive keeper Daniel Bentley when a fairly tame shot went in at the near post.
Johnson said: "I think he'll be disappointed. I don't really know what happened in terms of how it snuck over the line.
"It's poor defending [for Cooper's goal], the individual marked outside instead of inside and that's schoolboy. Against a side with about five players over 6ft3, 6ft4, it was never going to be easy from set-pieces.
"But you shouldn't concede from that distance."
Image: Millwall FC