Paul Robinson praised The Lions' Under 23s side for "going to the end" during Tuesday afternoon's 2-1 Professional Development League victory over Watford at Calmont Road.
Jimiel Chikukwa gave Watford the lead, but Chin Okoli equalised before Seb Drozd scored a stoppage-time winner in a game which saw the woodwork hit three times and both goalkeepers in action constantly.
"It was eventful!" Robinson told millwallfc.co.uk. "Similar to the last home game in which the lads had to keep going to the end - credit to them for that.
"The game became a little more open in the second-half. We feel as though we've had most of the chances in the first-half but not capitalised, but the way for Chin - who will feel he could've done better for their goal - to respond to going behind is to go and score himself, which he did. Thankfully, we got the winner that we deserved."
Ben Thompson started in the midfield for Kevin Nugent's side, and Robinson lauded the quality and experience the midfielder brought to the table.
"Thommo is different class and a great influence on our group. It's been excellent for the young lads to have him, especially with more of our experienced players out on loan. He has great experience himself and to have him in the side is good for our lads to learn from."