Paul Warne could not contain his delight after watching his Derby side complete a comfortable 3-0 League One win at 10-man Leyton Orient, their first victory at Brisbane Road since the 1964-65 season.

The Rams had gone ahead in the first half with a sublime strike from Louie Sibley before Orient defender Brandon Cooper was sent off for elbowing James Collins.

After the interval, Nathaniel Mendez-Laing and substitute Tom Barkhuizen netted one apiece to earn the visitors their fifth-successive league win as they moved up a spot to fifth.

“Obviously I’m very pleased,” Warne said. “We’re in it to win games of course and it’s good to see the lads in good fettle.

“They are good friends on and off the pitch and I think the team plays better when you have that in the dressing room. We have real confidence and you need that to win games and I thought we were handsome for the win.

“It was a really good day at the office. We could have played better in parts of the game but it’s all about winning so when you come away from home and keep a clean sheet and win then I don’t think you can have too many complaints as a manager.

“I liked the fact we won the game, scored three goals and created lots of chances.

“Our third one was a counter-attack from their corner and I enjoyed seeing six of my players running like the wind to get on the end of it. We were pretty solid and energetic but to be successful we need to be striving to the next level.

Orient coach Matt Harrold reflected: “I thought that we started the game great and things happened in the first 10 minutes which we worked on in training where we were on the front foot and everything was OK.

“But then they score a goal – probably against the run of play – and at the minute things are going against us and so it’s kind of where we are at the moment.

“Last week we were poor at Chesterfield but I thought we put on a good performance today but we’re giving ourselves a mountain to climb by conceding a goal and then losing a player to a red card which has a big bearing on the result.

“At two-nil down, we score one but have it ruled out for offside and then Derby score a third where we just not good enough and it’s those details against good teams where we have to be much, much better.”

Harrold had no complaints about the dismissal of Cooper.

“At the time I wasn’t sure as my view was the other side but having watched our red card again, I don’t think we can have any complaints and it doesn’t look good on the video,” he admitted.

Paul Warne understands why Derby supporters voiced their frustrations towards the end of his side’s 3-1 defeat at Stevenage.

Boro fully deserved to record a first win in four league games which lifted them up to sixth in the Sky Bet League table.

Derby, though, are so far not living up to their pre-season expectations, with a second straight away defeat hard to take for many of the travelling fans who made their feelings towards Warne clear.

“The fans who came aren’t happy; they’re not happy with me, they’re not happy with the football, they’re not happy with everything, and I understand that,” Warne said.

“We are not in this league to come to Stevenage and lose or underperform, and it is a disappointing day for everyone involved at the football club.

“We just weren’t good enough to beat Stevenage, who I didn’t underestimate, but just in moments we weren’t strong enough.

“If I am truly honest, I have never had to manage a group where your own fans give it to you and I appreciate their frustrations.

“We’ve been honest with the lads there, saying what we think, and we will have to try and bounce back Tuesday (against Northampton) and put a performance on.

“What is obvious for anyone who knows anything about football is we have got a soft underbelly.”

Jordan Roberts gave Stevenage the lead with a thumping strike after a free-kick was teed up for him in the 32nd minute, but that was soon cancelled out by Nathaniel Mendez-Laing’s neat finish.

Alex MacDonald then put the Boro ahead from a free-kick right at the end of the first half, which beat Derby goalkeeper Joe Wildsmith for pace.

Boro then secured victory with six minutes left when Kane Hemmings opened his account from Luther James-Wildin’s ball across goal.

Stevenage boss Steve Evans said: “We fully respected and acknowledged how good the opposition were.

“They are, in my opinion, the biggest team in League One and arguably if they’re in the Championship you could be saying the same.

“We knew we had to match them in every area and I think we’ve done that and more today.

“We should have won by more, but we don’t fail to recognise that for Stevenage to beat Derby County in a league fixture is for the whole town really.

“It is tremendous for us and I don’t really have a thought towards Derby other than that they are a terrific side.

“It is more hand-to-mouth here and we have to find a way to compete at the level we have come up into.”