Nottingham Forest moved into the third round of the Carabao Cup with a comfortable win at League Two Grimsby.
Steve Cooper made 11 changes to the side that began the 1-1 Premier League draw at Everton on Saturday.
Ryan Yates and Sam Surridge put Forest by two goals at half-time.
Surridge then grabbed his second to seal victory for the Premier League outfit.
"I'm really pleased with the first half. Second half, we had to manage a bit of a bombardment, really," Cooper said.
"I said to the lads, although we got through it, we could have managed some decision-making better early in the second half - we brought it on a little bit, when we didn't need to. That was maybe a little bit of the inexperience in some areas of the team.
"But then we scored an excellent third goal, and it was just a matter of seeing it out. After the performance and the result, I'm just really pleased with a whole host of debuts - from Wayne, who has played a million games throughout his career, to Zach, who got on at 16 for his first ever appearance.
"All of those things are really good. It was great for the likes of Remo and Cheikhou to play and experience the away fans, who were brilliant, as usual. And it was brilliant for the young kids."
"I thought Aaron Donnelly was excellent. For his first game, he played like a man. We're really proud of him and all the young players.
"It was a good performance and result. It was a cup tie; we want a winning mentality, we want to get through. But after that, it was brilliant to see those players involved. And brilliant to have Yatesy back on the pitch from the start as well. Loads of good pluses.
"There's always an environment to play in and an opponent to play against, but you always want the game to look like us. And I thought first half, we did; I thought we were excellent with our in-possession play and pressed the game.
"There were three great finishes. Two from Sam and one from Yatesy."