However, he was a surprise dropout from the starting XI ahead of the game, with Caoimhin Kelleher starting in his place.
Explaining his decision, Slot told Sky Sports: "We as a club follow the protocol and he had to tick all the boxes and yesterday he didn't tick the last box, so that means he cannot start.
"The good thing for us is we've got Caoimhin Kelleher, who has shown many times this season and in previous seasons that he's maybe even too good to be Ali's back-up."
There will be more to follow on this breaking news story and Liverpool.com will bring you the very latest updates, pictures and video as soon as possible.