Liverpool's highly anticipated summer signing, Jérémy Jacquet, has suffered a "serious" shoulder injury while playing for Rennes in a Ligue 1 match against Lens. The incident occurred during the second half of Rennes' 3-1 defeat on Saturday.

Jacquet, a 20-year-old center-back, fell awkwardly and appeared to be in considerable pain as he was helped off the field by Rennes' medical staff. He was seen cradling his left arm after being substituted in the 69th minute by Mahamadou Nagida.

Rennes' head coach, Habib Beye, confirmed the severity of the injury following the match. "For Jérémy, it's his shoulder, and for Abdelhamid [Ait Boudlal, the other Rennes player injured] it's muscular," Beye stated. "We'll have time to see, but it's definitely quite serious for both of them".

The injury comes just days after Jacquet reportedly agreed to a deal to join Liverpool on July 1, beating out competition from Chelsea. The transfer fee is believed to be £55 million plus £5 million in add-ons, with Jacquet signing a five-year contract with an option for a further 12 months. The young French defender will remain with Rennes until the end of the current season.

The extent of Jacquet's injury and the potential impact on his move to Liverpool remain uncertain. A timeline for his return to action is yet to be determined. The unfortunate timing of the injury, just five days after he supposedly passed his medical with Liverpool, adds a cruel twist to the situation.

Liverpool has been struggling with injuries to key defenders this season. Currently, Giovanni Leoni, Joe Gomez, Jeremie Frimpong and Conor Bradley are all sidelined. Jacquet's arrival was expected to bolster the team's defensive options.

The club has not yet released an official statement regarding Jacquet's injury. Fans will be eagerly awaiting updates on his condition and the potential implications for his future with Liverpool.