The 20-year-old will move to Anfield at the end of the season after agreeing a deadline day deal with the Premier League champions, who are in desperate need of defensive reinforcements.
However, Jacquet suffered the injury during the French team's 3-1 Ligue 1 defeat to Lens on Saturday which has led to worry from Liverpool fans who may not get to see the defender for the rest of the current season.
The defender was forced off with a shoulder injury in the 69th minute of the defeat to Lens and according to L’Equipe, Jacquet will need an operation in order to recover full fitness, which could mean the end of the season for the youngster.
Rennes manager Habib Beye spoke on the injury after the game but gave little away as he ponders over the situation.
“For Jeremy, it's his shoulder, and for Abdelhamid it's muscular. We'll have time to see, but it's definitely quite serious for both of them.”
The report adds that he could miss several weeks of action in a best-case scenario and if the surgery does not go perfectly, he could miss some of Liverpool’s preseason.
Reds manager Arne Slot already has his summer signing Giovanni Leoni already out for the entire season in what has been an unlucky run of transfers for the Dutchman as he aims to solve his defensive woes.