Millwall U21s 3 Birmingham City U21s 0A Jamie Philpott brace added to a Sofiane El-Bekri header eased Millwall's U21s to their second victory inside four days, beating Birmingham City 3-0 at the training ground on Friday afternoon.
Neil Harris described the performance as "excellent from the first to last minute."
Chopper's charges had to wait until the 39th minute to make their dominance pay when they scored a fine counter-attacking goal with Philpot perfectly placed at the far post to convert Dylan Casey's cross.
The second goal which effectively ended the contest came from a Magaye Gueye corner, flicked on by Jack Powell for the smallest man on the field, El-Bekri to head home.
Philpot's second and Millwall's third, also resulted from a corner, this time taken by Powell who picked out the striker in the box.
Chopper added: "I'm so pleased for Jamie, who has stepped up from the U18s to this level recently, and all he needed to add to some impressive performances was a goal.
The attitude and desire of the whole team was first class and when we were able to add some quality we got our reward. The clean sheet was particularly pleasing because I had been a bit critical of the team defensively in recent games.
It has been a tough week for the boys, to play this game so seen after 120 minutes of cup football on Monday night, but it's been a great learning curve for them in terms of recovery and will stand them in good stead."
Millwall: King, Siafa (Webb 85mins), Nelson, Goodman, Casey, El-Bekri, Powell, Thompson (Wood 75mins), Gueye, Onyedinma, Philpot. Subs not used: Gerrar, Rylah, Farrell.