'It's a learning curve' says coach
John Marquis marked his return from a loan spell at Cheltenham Town with the game's opening goal on 62 minutes, but Cardiff responded almost straight from the kick-off through Danny Johnson, who then added his - and the visitors' - second goal of the night to secure victory with 15 minutes remaining.
Neil Harris felt that there was plenty to be positive about after Millwall U21s were pipped by the odd goal in three against Cardiff City in Monday night's Professional Development League 2 match at Dartford FC.
"I thought that we were outstanding in the first half on a very heavy pitch," Chopper told millwallfc.co.uk. "The surface wasn't conducive to the flowing football that we like to play and we had to go a bit more direct, but I thought that we were really, really good, we got a lot of the second balls and created lots of clear cut chances in the first 45 minutes especially.
"In the second half we didn't hit the same levels; Cardiff came into the game a lot more but even so, we took the lead and they still hadn't really caused us any major problems.
"I thought we were comfortable, but then we let them back in very quickly and that is something the lads here have to learn to manage our game. By that I mean that the buzz and the real highs you get when you go ahead have to be managed in such a way that they still concentrate and do their jobs properly, keep playing the right way and not give up the advantage.
"Exactly the same happened at West Ham recently, we took the lead and gave a goal away within two minutes so we have to install that concentration, ability to manage the game properly, in them. That is twice in the last three games we have had the lead and given it up quickly, but it is a learning curve and there were certainly so many positives to take out of our performance tonight.
"It was nice for John Marquis to come back and score a good goal, and I also thought that Kyren Farrell and Callum Webb both had excellent games too. So yes, definitely lots of plus points for us to take from the performance."