"We'll be going there trying to end that [unbeaten run]. It's got to end some time," said Pratley
"We owe them one to be honest. They beat us at our home ground so we want to go there and get a little bit of revenge against them."
But Pratley, who is fit after suffering a knee injury in the 3-1 over Peterborough at the weekend, says the Swans will treat the third-against-fourth clash like any other game.
"You don't get any more than three points for any game. Obviously they're third, we're fourth, but it's three points and we'll be going there trying to win like we do every game.
Give your thoughts on Nottingham Forest v Swansea City
"I don't see it as any more of a big game than Peterborough on Saturday. Obviously they're a good side. They're a good squad
"They know how to win games, but they've had a little bit of a dip in form away from home in their performances and results.
"They've come up from League One and we knew they're a good team, we knew they'd spent a lot of money in the summer to try and get into the Premier League."
He also believes Swansea can overcome their midfield injury crisis that sees Ferrie Bodde, Joe Allen and Andrea Orlandi sidelined.
He said: "We've got a lot of injuries. It's disappointing for the guys personally that they're going to miss games, but we've got players that can come in.
"I think the players we've got here are contracted to Swansea City so obviously they've got the be good enough to come in and play.
"Swansea City have given them contracts so it's not as if they're weaker players. They're good enough players and I'm sure they'll want to grab their chance and play.
"The boys that come in should be raring to go and wanting to grab the shirt."
Source: BBC Sport
Source: BBC Sport