Manchester City defender Matija Nastasic has picked up an ankle injury in his sides Asia Trophy final win over Sunderland.
The defender suffered picked up the injury in the final of the pre-season tournament played on a water soaked pitch in Hong Kong.
City manager Manuel Pellegrini says the club plan to assess the injury when they return to the UK, but would not blame the poor playing surface.
"It is part of the game and could have happened on any pitch," he said.
"We are concerned but it is better to wait. He received a kick to his ankle and the doctor is seeing what it could be, but it is impossible for him to know.
"The doctor needs to see him when we arrive in Manchester and then we can know what has happened."
Sunderland manager Paolo Di Canio had previously described the surface at Hong Kong Stadium as "a killer pitch".