text: Vincent Kompany has emerged as an injury doubt for the Manchester derby. City boss Manuel Pellegrini revealed that the Belgium centre-half will be assessed on Saturday, 24 hours ahead of Sunday's clash at Old Trafford. The Chilean, whose side have slipped into fourth place, also reinstated that he has no fears over his job amid mounting pressure. Aleksandar Kolarov (11), Frank Lampard (18) and Edin Dzeko (10) lead the way in Manchester City training . Yaya Toure attempts to control the ball during training at the City football academy . Sergio Aguero leaps up in the air in front of Bacary Sagna to win a header during training . However, he did admit: 'We will see what happens in August.' City captain Kompany, 29 on Friday, would be a huge loss despite his patchy form this season. He played 90 minutes in Monday's 2-1 loss against Crystal Palace but picked up a hamstring injury at Selhurst Park and Pellegrini said he is doubtful for the match against Louis van Gaal's men. 'Kompany we will assess tomorrow,' he said. 'He worked the whole week the normal way. I always say the same. We are always better with Kompany but if he cannot play we have a squad.' If Kompany is deemed unfit City could be facing a defensive crisis with Dedryck Boyata also injured. That would leave Pellegrini with a pairing of the ageing Martin Demichelis and the inconsistent Eliaquim Mangala. Vincent Kompany is an injury doubt for Manchester City's clash against Manchester United on Sunday . City captain and central defender Kompany played 90 minutes as City lost 2-1 to Crystal Palace on Monday . City manager Manuel Pellegrini insists he does not fear for his job, despite his team dropping into fourth . City are in fourth place, a point behind United, after losing three of their last five Premier League matches and taking 18 points from 36 since the turn of the year. Some have speculated that Pellegrini could face the sack at the end of the season. When asked if he was worried about his future he said: 'I don't think so. I am not talking about my future because it's not important. I'm just thinking about the game against Manchester United.' However, he added: 'You never know what will happen in August. if you ask me I am not afraid because I think we are in a bad moment . 'We are not a disaster, we are not a mess. We are doing a lot of things well.' City, who will also be without strike pair Stevan Jovetic (muscle injury) and Wilfried Bony (ankle and knee), will be going for five straight derby wins for the first time in their history against third-placed United who are a point in front. But Pellegrini refused to say that they were now the biggest club in Manchester. Eliaquim Mangala (left) could be set to replace Kompany in the team to take on United on Sunday . Strikers Stevan Jovetic (left) and Wilfried Bony are already out of the Manchester derby through injury . 'I don't like to compare,' he said. 'Our target is not to compare but to improve in our project. Pellegrini added that his men were still using a certain ex-United manager as motivation. 'United dominated the league for so many years, but one time Sir Alex Ferguson said the neighbours are disturbing them a little bit more, so I say that's double motivation for us,' he said.
target: Vincent Kompany to be assessed 24 hours before Old Trafford clash .
  Manchester City looking to overtake rivals Manchester United with a win .
  City boss Manuel Pellegrini insists he has no fears over his job status .