The Sky Blues coach has also praised the performance of City striker George Thomas who found the net in style...
Coventry City first-team coach Jamie Clapham was delighted with the performances of Ruben Lameiras and Marc Antoine-Fortune following the 4-1 win over Colchester United.
The Sky Blues secured an impressive victory against the U's with goals from Lameiras, George Thomas, Lateef Elford-Alliyu and Devon Kelly-Evans.
The former Spurs winger and Fortune both started for the Under-21s today as Lameiras recovers from his illness last week and Fortune continues to gain more match fitness.
Clapham praised the duo's attitude and performance against Colchester and praised the atmosphere at the club.
He said: "Today, we had a few first-team players come into the side who needed minutes. It was a collective decision as Ruben was ill last week and needed some game time, and Marc hasn't played much football since he left Wigan.
"They undoubtedly made a huge difference and they put in a really good shift for us which is great to see. We've got a big month coming up where we play Saturday, Tuesday, so we need to make sure everyone is up to speed and available.
"You always see a lot of the first-team come and watch the games, and I think that shows the character in the dressing room. It's a good atmosphere around the club and it stretches to the Under-21s.
"The first-team came in this morning for training which was nice and sharp, we had our debrief from the weekend's game and then you see them come down here to support the lads. It's a great place to be at the moment."
Thomas found the net with a brilliant second-half goal and Clapham praised his performance and his goal tally for the Under-21s.
He added: "George had a real sharpness to his game, a real edge. When he received it, it always looked like something was going to happen. He started wide and then played in the No.10, and brilliant in both.
"There were a lot of good performances. I've always been impressed with the way they work and train, and they want to go and win games which is great to see.
"Adam also did well today and I think that's testament to the group really. When players come into the club, it is a welcoming environment and people immediately settle."