Brentford boss Thomas Frank explained Kris Ajer's pre-match withdrawal before victory over Luton.
Saman Ghoddos moved into the starting XI as his replacement.
He got a foot injury that that he tried to push through.
"Unfortunately, he couldn't make it for the game. We will assess him tomorrow to see how that looks for Brighton," Frank explained.
We knew there could be that risk with Ajer, but Saman was prepped before the game and was ready - I think he performed really well."