Man City boss Mancini admits all-or-nothing against Ajax
Mancini has already admitted City need "a miracle" to salvage their Group D campaign after taking just one point from their opening three games.
"Maybe we conceded a lot of goals when we started the season," he said.
"Now, we've improved our defensive phase but we need to start scoring like last year and I think we need to improve this offensive phase. We need to work for this."