Socceroos skipper Mile Jedinak is in doubt for Australia's World Cup qualifiers against Bangladesh and Tajikistan after injuring his hamstring playing for Crystal Palace.

Jedinak came off early in the second half of the Eagles' 4-1 League Cup win over Shrewsbury Town on Monday.

Socceroos skipper Mile Jedinak. Credit:Getty Images

Crystal Palace manager Alan Pardew was concerned that the injury could sideline his captain and midfielder for some time.

"I'm a little bit worried about the skipper, he might have done a hamstring, but we'll have to wait and see," Pardew said.