Doncaster Rovers striker Billy Sharp is to have a further scan after being diagnosed with ankle ligament damage.
The striker suffered the injury during Doncaster's opening day defeat at Brighton, where Sharp had put his side in front before being substituted early in the second half.
A timescale for his return has yet to be decided after manager Sean O'Driscoll confirmed an X-ray will take place to discover whether Sharp has suffered a fracture to his leg.
"He had a scan this morning, there's obviously damage, and we're just waiting to see the specialist tomorrow to find out the full extent," O'Driscoll told the club's official website.
"He's got another X-ray a bit higher up his leg tomorrow, to make sure there isn't a fracture, which the ankle scan would have missed.
"The injury is going to affect the shape of the team massively, he's a goalscorer, and he's the focal point of the attack, so he's going to be a massive loss."
Meanwhile, James Hayter hurt a knee against Brighton, but his condition has improved since the weekend and he may not need a scan.