Speaking to TNT Sports, Slot said: “Ryan Gravenberch became a dad last night.
“Ideally you want to play the best possible game you can play.
“But we also know how difficult it is to play that game against Palace because they are here for a reason: they beat [Aston] Villa in the [FA Cup] semi-final and [Manchester] City in the final.
“And at the end of the season, Arsenal and us were not able to win against them in our own stadiums. We know how good or how smart it is to keep the team together because that’s what we did last season and we know the end result.
“Palace has exactly the same team playing for them today that played for them throughout almost the whole of last season. So, a big challenge ahead of us.”