Pep Guardiola claimed Sergio Aguero and Gabriel Jesus cannot play alongside each other until Benjamin Mendy returns from injury.
The Manchester City manager insisted the choice between the pair is now his hardest decision, with one set to miss out each week.
Mendy is not back from a ACL injury until April and Guardiola revealed the left back's ability going forward dictated that his star strikers could line-up together.
'Both have different qualities - they deserve to play,' Guardiola said.