Salah played the full 90 after starting on the bench for the midweek Champions League defeat at Galatasaray.
Slot said: "That's then interesting: did he create today so much because he didn't play during the week or did he miss the chances because he missed a bit of sharpness that he could have had if he would have played against Galatasaray?
"We will never know. What I like is that we brought him many times in the position he would like to be in and I would like him to be in, because he's shown in his career and since I'm here that in those positions he can score goals. And I think today he had many opportunities to do what he's done so often.
"But he is a human being and it's not like every chance he gets is always a goal – we feel sometimes it is because of what he's done last season and so many times. But he can also have a game where he has chances and a lot of times in promising positions and doesn't have a goal or an assist."