Ivorian insists Roberto Mancini's side does not care about its 6-1 win at Old Trafford earlier in the season and admits he thought the title would have been decided by now
The Ivorian believes that City has outperformed its neighbors over the campaign and also admitted he expected the title race to be finished by now, after seeing his side lose form in January and March.
"We have more at stake than them; if we don't win this match, we are out of the title race," Toure told Goal.com.
"We have lost too many points in the last few months but now we have a chance and we can't waste it. It's a final for us."
Toure went on to say that City is the best team in Manchester this season despite sitting three points behind United, with both teams having played 35 games.
"I don't know how the title race will finish or who will be champions but I haven't changed my mind, we have played a lot better than United this season," Toure continued.
"I didn't expect the derby to be so decisive in the title race. Both us and them could have wrapped it up by now but in the end this will be the decisive match, and that makes things a lot more exciting."
Toure doesn't believe that playing the game at the Etihad Stadium will give City a huge advantage and points to his side's incredible 6-1 victory at Old Trafford earlier this season as proof, while also claiming that Roberto Mancini's squad "don't care" about that game now.
"We have home-field advantage but in these derbies anything could happen," he said. "Just remember the 6-1 at Old Trafford this season. We made history there but now they arrive three points ahead.
"The 6-1 [win] was beautiful and we'll never forget it but now we don't care. We only think on winning, whatever it takes, if you ask me, I'd be ecstatic if we won 1-0."
Toure says his team needs to get off to a quick start. He is hoping that his team makes noise in the first minutes and finishes on its first scoring chance.
"I think it will be a very open match. We will look to win it but let's see how United decide to approach it," he said.
"I don't know which approach would be better for them. If they are conservative and gift us the control of the ball they are going to struggle in their box, but I'm not convinced they are interested in a box-to-box match."
The Ivorian also dismissed the game being decided solely by the sides' respective top-scorers Sergio Aguero and Wayne Rooney, and pin-pointed Carlos tevez as a key player, against his former side.
"[Will the game be] a personal duel between Aguero and Rooney? I don't think so," Toure stated. "We don't think on personal battles, we just want to win. On Monday we have to defeat United even if it's a defender who scores the decisive goal.
"I see a very motivated Tevez but it will be Mancini who decides if he plays or not. You don't have to motivate Carlos when he plays against United. It will obviously be a very special match for him."