Liverpool defender Giovanni Leoni is out for "about a year" after tearing his anterior cruciate ligament, manager Arne Slot says.
The 18-year-old sustained the injury on his debut against Southampton in the Carabao Cup third round on Tuesday.
Leoni joined the Reds in August from Parma for a fee of £26m plus add-ons.
"He is not in a good place because he tore his ACL which means he will be out around a year," said Slot.
"Being so young and coming to a new country and playing so well in your first game, it's very hard to take the positives.