The forward missed the Reds' Champions League win over Bologna in midweek due to an injury concern, but may resume training on Friday afternoon.
Nevertheless, Slot will determine whether he can be part of the travelling party to Selhurst Park later today for Saturday's Premier League fixture.
The boss told his pre-match press conference: "[It's] wait and see. He didn't train for the last two days.
"He came in today to see if he could train and if he can I still have a decision to make because we can only select 20 [players] and he hasn't trained for a few days.
"But first of all, we have to wait and see if he can even train - and if he can then it's our decision if we bring him to the game or not."
