Virgil van Dijk, Trent Alexander-Arnold and Mohamed Salah are all out of contract at Anfield at the end of this season but the manager will be happy as long as the trio are contributing positively to the club's season.
Slot said: "For me the contract situation could become a problem if the players don’t perform as well as they do at the moment.
"Of course it’s not sure that if, if, if they perform not as good any more that it has anything to do with their contract situation.
"At the moment all three of them are in a good place, all of them perform really, really, really well and there are ongoing discussions, as Virgil said, with the people he has to talk with, and that’s not me as you know. I talk with him to him about other things.
"Let’s wait and see but all what he said is completely right in that he doesn’t exactly know what the future will be as long as he doesn’t sign the contract yet."
Slot has won 12 matches out of 14 since taking over from Jurgen Klopp at Anfield and says that he is constantly learning about his team.
He said: "I think you learn every day, especially if you’ve (not been) long with the team as I am.
"You learn every day from new situations. I said from the Chelsea game something I learned from that was that they could sit deep and defend a lead. The way they came back against Arsenal was really strong, and then the amount of games they play and still be available and still play good football."