Bristol City U21s 1 Millwall U21s 3Lions U21 coach Neil Harris was delighted with his side's display as they ran out 3-1 winners at Bristol City on Monday.
Millwall fell behind to a penalty five minutes before the break when Jack Powell fouled Ben Withey in the box and Lewis Hall beat Tom King from the spot even though the keeper got his hand to the ball.
But Chopper's charges levelled three minutes later when Fred Onyedinma broke from inside his own half and exchanged passes with Jermaine Easter before slotting the ball home from close range.
The Lions carried their momentum into the second half and took the lead on the 50 minute mark when Aiden O'Brien cleverly backheeled Easter's cross in off a post.
With Jake Goodman and Sid Nelson commanding at the back Millwall launched a number of quick counter attacks and it was from one such, led by Sofiane El-Bekri, that Onyedinma wrapped up the scoring with a great strike ten minute's from time.
Fred might even have completed his hat-trick but saw a late effort cleared off the line by Jack Batten.
Chopper commented: "We made a very fast start and enjoyed a lot of possession but in spite of looking lively in wide areas we didn't create many chances early on.
"When they scored against the run of play it seemed to galvanise us and once we'd equalised I felt we took control of the game. We scored some excellent goals, and the only disappointment was that Fred didn't get the hat-trick he deserved."
Millwall: King, Siafa, Nelson, Goodman, Wood, Powell (Farrell, 52mins), Thompson, O'Brien, Onyedinma, Easter (Philpot, 80mins), Jeffrey (El-Bekri, 58mins). Subs not used: Webb, Girling.