Alexander Isak was forced off immediately after scoring for Liverpool against Tottenham(Image: Getty Images)
Liverpool has confirmed Alexander Isak underwent surgery on Monday on the leg injury he sustained against Tottenham Hotspur last weekend.
Arne Slot is expected to provide an update on Tuesday, but the club has confirmed ahead of the head coach's press conference at the AXA Training Centre that Isak suffered a broken fibula and ankle injury as a result of the strong challenge from Micky van de Ven.
The Dutchman slid in and caught Isak as he converted Florian Wirtz's pass to score the opening goal of the game.
The former Newcastle United man appeared in immediate discomfort and had to be helped off the pitch by two members of staff.
"It's difficult to know what he exactly has," Slot said immediately after the game. "But it's never a nice thing that after the goal he collided with their defender. Hopefully he's fine, but we have to wait and see."
Reports subsequently emerged that Isak had suffered a serious problem, and perhaps even a broken leg. That was confirmed by Liverpool on Monday, along with the news that no timescale has been placed on Isak's recovery.
"Alexander Isak today successfully underwent surgery on the injury he sustained on Saturday," the club said via a statement.
"The Liverpool striker was injured in a challenge in the process of scoring the opening goal against Tottenham Hotspur and had to be substituted.
"After diagnosis, an operation was completed today on an ankle injury that included a fibula fracture.
"Isak's rehabilitation will now continue at the AXA Training Centre, with no timeframe yet placed on his return."
The injury is a hammer blow to Liverpool. Slot's small squad has already been diminished by the season-ending injury sustained by Giovanni Leoni, while Mohamed Salah is currently at the Africa Cup of Nations with Egypt.
The news also continues Isak's nightmare start at Liverpool since his record-breaking £125 million ($168M) transfer on deadline day.
The 26-year-old arrived lacking match fitness and, after finally being declared match fit by Slot, suffered a groin injury days later.
He recovered in late November, but his performances have underwhelmed in the weeks since.
Isak did manage to score his first Premier League goal in win over West Ham on November 30, and Saturday's opening strike against Spurs was just his second since joining Liverpool.
It is not clear whether the Premier League champions will look to strengthen in the market following Isak's injury, but the Reds are keen on Bournemouth star Antoine Semenyo.