Players' response earns praise from Clark.
LEE Clark has praised his Blues players for being receptive.
The manager said that he could try things this season that 'backfired' in the previous campaign.
The flexibility and propensity of his team to change in-game was pleasing.
"They are a very receptive group because, I have got to say, for the first time during my spell here as manager, on Tuesday when I changed the system two or three different times, for different parts of the game to get back a foothold or us to match them, the players responded. In the past when I have tried to do that, it has backfired hugely.
"That's because the players haven't been receptive enough to do it. So that's great credit to them now.
"Millwall changed their formation three times and when they did it, they had a good spell. So we have to then do something back to counteract it, and we did - and the players bought into it."
Clark said that being able to see out a game after leading at half-time, unlike on so many other occasions this season, was a significant moment.
"A watershed? Hopefully it is in terms of confidence and what people believe, the perception.
"In every game, apart from Wigan, we have been dominant, or had dominant spells.
"Performance levels have been good, in general. That's why at Millwall I didn't feel the need to change lots of things, it was just getting inside the players heads, telling them just have no fear lads."