Liverpool's miserable performance against Galatasaray was compounded by injuries to two key players in the 1-0 defeat.
Alisson immediately waved to the medical staff when he went down to save a one-on-one from Victor Osimhen in the second half.
And Hugo Ekitike appeared to grab his hamstring after stretching for a loose ball just minutes later.
Both Alisson and Ekitike were subbed off and seem likely to miss the huge Premier League game away at Chelsea this Saturday.
Slot will no doubt feel the injuries were completely needless, with Alisson forced into action after Ibrahima Konate gave the ball away, allowing Osimhen to sprint forward.