Doncaster Rovers striker Billy Sharp fears he faces a few weeks on the sidelines after suffering a hamstring injury against former club Sheffield United.
Sharp scored Rovers' second goal in Saturday's 2-0 win over the Blades, but was forced out of the game a few minutes after half-time.
The 24-year-old will undergo a scan on the injury on Monday, but is not expecting a swift return to action.
"I doubt I'll be around for a while with this injury," said Sharp. "I have never done anything like it before, so I've no idea how long I shall be out.
"I'll have a scan on Monday and see what happens from there."
Sharp left Bramall Lane for Doncaster on a permanent basis in the summer and was delighted to mark his appearance against his old side with a goal.
He added: "For the last seven days, all I have been dreaming about is being in the right place at the right time just once in this game.
"I figured that if I couldn't be scoring for the club I support, I'd love to be scoring against them.
"Luckily, I have been able to do that and I am delighted. But I am really gutted about getting injured."