Burnley's Matt Lowton was struck with a bottle in his side's Premier League game at Leeds on Sunday.
The defender was hit by a plastic bottle full of liquid, thrown from the home supporters' area, while celebrating the Clarets' equaliser.
Lowton had a noticeable red mark on his forehead after the incident and stopped to show referee Paul Tierney.
"Hopefully he's alright, we don't want to see that," Burnley boss Sean Dyche told Sky Sports.
"I don't want to over-egg that, it was a great atmosphere in the stadium, obviously we were just on the wrong end of that atmosphere there, but I don't want to over-egg that."