Monaco sealed a spot in the Champions League thanks to a 1-0 win at Lorient in the final round of Ligue 1 matches.
Liverpool give U21s more game time than Premier League rivals but top flight lags behind Europe.
Nolan Roux scored in each half as Lille coach Rene Girard bowed out in style with a 4-1 win over already-relegated Metz.
Monaco cruised to a comfortable 2-0 win over Metz at the Stade Louis II to move up to third in Ligue 1.
PSG are on the brink of winning the Ligue 1 title after Caen stunned Lyon 3-0 on Saturday, while Metz were relegated.
Metz were relegated straight back to Ligue 2 on Saturday as they suffered a crushing 4-0 defeat to Lorient.