Manchester City in further turmoil after Mario Balotelli is involved in dressing-room clash with Yaya Toure Mario has everything to do his job well but he doesn't understand very well his situation. In a game like this, the striker should be the difference. Not in the last two or three minutes, but before. Mario and [Edin] Dzeko should have scored two or three goals in a game like this. When asked if he had considered substituting Balotelli, Mancini said: "We had only Carlos [Tévez] on the bench. I thought about this after five minutes. With City having have won just two of their last six games in all competitions, the initiative now lies firmly with United. Sir Alex Ferguson's squad now travel to Blackburn and then face Queens Park Rangers at Old Trafford on Sunday lunchtime, three hours before City play Arsenal at the Emirates, with Mancini hoping for an unlikely slip-up by United at Ewood Park on Monday night. If we go eight points behind, then it is finished. This is normal. But United will draw at Blackburn. Do you want to bet with me? This is my opinion. We have 71 points with seven games left and I think we should [continue] to believe in ourselves at this moment because we will have time for the other things. Fatigue appeared to be a critical factor against Sunderland, who led 3-1 until the 85th minute, and Mancini admits City's performance was lethargic. We were really flat in the first half. This was really strange, and some players played really bad. But I think we have improved from last season and it is clear we want to win the title. We will fight until the derby [on Apr 30] because I think that game will decide our season. Now we are in a difficult moment, but football can change in two or three games. Despite suggestions that City are losing the psychological battle, captain Vincent Kompany insists that the squad is not being affected by nerves. "There's no-one in this team who hasn't been in this situation before in another league," he said, "The reality is that it is not in our hands any more, so we'll need other teams to take points off United." Sergio Aguero, who missed the Sunderland game due to blistered feet caused by a reaction to a medical spray, is expected to be fit for Sunday's trip to Arsenal. But Mancini hinted at his annoyance with the club's medical staff when asked whether he retained full faith in them. "I trust only my personal doctor," he said. We lost Aguero to a stupid situation. It is incredible that we should lose our best striker for two games at such a crucial stage of the season.