Lambert predicts breathless "toing and froing" between now and the end of the season.
He said: "What our win does is bring teams above us into it as well.
"If you look up to twelfth or thirteenth place, there's not much in it and there's still nine games to go. There's still big games to come.
"I think there will be a lot of toing and froing throughout the coming games.
"We've pulled a lot of teams back into it and we're playing well at the minute so I'm extremely happy with that. We have momentum.
"I've looked at everybody's fixtures and there's so many hard games coming up, including the ones we've got ourselves.
"But we've put ourselves in a position where we're in a fight with seven or eight other teams.
"I said a few weeks ago we'd got twelve cup finals and now it's nine cup finals. That's the way to view it and we will certainly go into the next game with a lot of confidence."