Dagenham boss John Still labelled his team's 3-2 victory over Oxford as an "excellent away performance".
Sam Williams and Luke Wilkinson capitalised on some poor Oxford defending at set-pieces to find the net either side of Luke Howell's follow-up effort.
But the away side had to hold on after Tom Craddock grabbed his second of the game and Daggers midfielder Kevin Maher was sent off for a second bookable offence with 20 minutes to go.
Still said: "I thought we were the better team and played really very well. We worked very hard for our goals and gifted them two goals.
"We've got a young group, the only experienced player was Kevin Maher. I should have taken him off before the red card, and I was going to to be honest.
"But even when we had 10 men they only had the one save our goalkeeper made from Adam Chapman. That was their only effort. I thought it was an excellent away performance."