Olympique Lyon coach Bruno Genesio concedes they face losing midfielder Tanguy Ndombele in January.
The new France cap is being watched by PSG, along with Premier League giants Manchester United, Manchester City, Chelsea and Tottenham.
OL president Jean Michel Aulas believes they can raise €80m for his sale in January.
And Genesio said yesterday: "We know it's going to be difficult to keep him, for us it pays to get our players to even more prestigious clubs."
OL's previous record sale was Alexandre Lacazette's move to Arsenal for €53m.