Kevin Nugent oversaw a 2-1 win for Millwall's Under 23s at Beckenham Town on Tuesday night - but claimed his side have "work to do" ahead of the new Professional Development League campaign.
Tyrese Briscoe and Sean O'Brien's goals gave the young Lions back-to-back pre-season friendly victories, but in speaking to millwallfc.co.uk after the final whistle, the manager told of things which had been "highlighted" to him during the game for improvement.
"It was another good test for us," he said. "We only organised the game on Sunday, so our thanks must go to Beckenham for putting the fixture on. It was fantastic to have fans back in to watch us once again as well.
"Once again, we had trialists in the team and things were chopping and changing, but the most positive thing was the physical work which came from it.
"We have a lot of learning to do this season, though. That showed tonight - there is a lot of work to do. They found a way to win the game, which was pleasing, but a few bits have been highlighted for me."
Briscoe gave Millwall the lead as early as 22 seconds in, whilst O'Brien - who, along with Junior Tiensia, played for The Lions' first-team in a behind-closed-doors pre-season friendly against Fulham earlier in the day - scored the winning goal in the second-half.
"It was a really good finish from Tyrese, he has shown some really good qualities. Junior and Sean had 10 minutes for the first-time earlier in the day as well, which was good. They're young lads - would they rather sit at home and watch TV, or get out and play another game of football? They both dealt really well with that.
"All the players have individual plans - some will need more minutes than others, some are more robust than others, but we've got to equally develop them all without things becoming too risky."