Former Borussia Dortmund coach Ottmar Hitzfeld expects Jurgen Klopp to have the measure of Thomas Tuchel.
Klopp's Liverpool meet PSG in Paris tonight with both teams' Champions League hopes on the edge.
Hitzfeld said, "If Tuchel will manage to upset Klopp? It seems unlikely to me, Tuchel will not surprise Klopp.
"The two men know each other by heart. They know everything about each other's team.
"This match will be very balanced and it is a detail or an individual action that will make the difference."