Leyton Orient boss Russell Slade called on his men to show their "ruthless" side after their 3-2 win at Portsmouth on Tuesday night.
Kevin Lisbie put the visitors ahead after 32 minutes at Fratton Park, six minutes after Pompey striker Izale McLeod had a penalty saved by Orient stopper Ryan Allsop.
The London club doubled their advantage through Moses Odubajo after 52 minutes, but McLeod was handed a second chance to score from the spot four minutes later and blasted the penalty home.
Lisbie won a spot-kick for the away side after 61 minutes and stepped up to fire it low past Mikkel Andersen. Scott Allan pulled another back for the hosts after 65 minutes as Pompey laid siege to the Orient goal.
Slade said: "It's another fabulous result away from home. I didn't think it should have been left for a nervy last 10 or 15 minutes really. It was an entertaining game, for sure. But we didn't need it to be so entertaining. We should have been home and dry. I think we needed to be that little bit more ruthless.
"When we were in that losing spell, no-one felt sorry for us. People just rammed it home and rammed it down our throats. That's what I've asked for from my team. When we've got our foot on somebody's throat, we don't let it up. We finish them off."