Mohamed Salah outshone Neymar and Kylian Mbappe on the Champions League stage last season, but as Paris Saint-Germain's star duo head to Anfield on Tuesday seeking to make amends, the Egyptian is struggling to match the heights of his debut campaign at Liverpool.
PSG cruised past Saint Etienne anyway, winning 4-0 at the Parc des Princes.
"But he didn't sleep well and when I asked him if he was ok in the morning he replied that he "didn't know".
Goals from Edison Cavani, Angel Di Maria, an own goal scored by Timothée Kolodziejczak and Diaby was enough for the Parisians to remain on top of the league table.
But, after recently labelling Kylian Mbappe and Neymar as the two best players in the world, Al-Khelaifi lavished similar praise on the latest man charged with delivering European glory to PSG.
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"I know that many people view the Liverpool match as the most important", Tuchel said.
Tuchel told the club's official website: "I'm very happy with this victory, our sixth in a row since the start of the season".
Julian Draxler, who deputised for Neymar, had an early chance to grab the lead for PSG in the third minute with a first-time strike that forced a great save from Saint-Etienne shot-stopper Stephane Ruffier. "I didn't want to take any risks and we decided together that he wouldn't play". If we work well every day, if we live well every day as a group, we should be ready for the big matches.
He told www.asse.fr: "Based on the first period, the score is very hard on us".
But the German does recognise facing compatriot Klopp at Liverpool's historic home will be a real challenge for his team.
World-record signing Neymar was rested for the encounter, while Mbappe missed out through suspension for the hosts. We lost too many easy balls and that gave our opponents solutions.