Arne Slot had challenged his grieving players to honour Diogo Jota’s memory as they began the difficult process of returning to football. On Sunday, at Deepdale, that process started. Liverpool’s next game, at Anfield against Athletic Bilbao on August 4, will likely be even more emotional. But after a seven-minute mutual applause at full-time, Slot could not have asked for more from such a difficult day.