Liverpool head coach Arne Slot admitted the challenge of managing the minutes of his overworked squad has kept him awake at night.For the last five matches he has only been able to name a name a maximum of four senior players on the bench as he deals with a quartet of long-term injuries have started.Although he has midfielder Dominik Szoboszlai back from suspension he has lost Wataru Endo most likely for the rest of the season after a serious ankle injury in Wednesday’s Premier League win at Sunderland.