Manchester City legend Colin Bell has rated David Silva and Sergio Aguero as the most vital players in the current squad.
Spanish playmaker Silva and Argentine striker Aguero have recently been sidelined with injury and Bell feels their absence has been evident in City's performances.
He told City's official website: "We've invested a lot of money into the team in recent years but for me, Silva and Sergio Aguero are irreplaceable in my opinion."
Bell is hoping for the duo to make a comeback from injuries in the Saturday's game against Liverpool.
"We have a terrific squad of players, but if you take those two out of the equation, we lose some of our cutting edge so like every other City fan, I hope they are both back in the team as quickly as possible and preferably this weekend against Liverpool."