Jeffrey Schlupp is set for a scan on Monday amid concerns he will miss at least a month with a hamstring injury.
Crystal Palace midfielder Schlupp pulled up in the first half of their 2-0 win against Sheffield United, in which he scored the opener, and was forced off after a period of treatment.
Manager Roy Hodgson said: 'Jeff Schlupp is more concerning as it is definitely a muscle injury. He felt a hamstring pull.
'It looks like we're going to miss him for a while and that's unfortunate because he's been doing very, very well for us.