Juventus have confirmed Federico Chiesa suffered an anterior cruciate ligament injury in the comeback win over AS Roma on Sunday.
The Italian forward went down following a heavy challenge from Chris Smalling in the first half of the game at Stadio Olimpico, and continued playing for a few minutes before eventually limping off.
Concerns were raised when images of the player in a leg brace surfaced following the game, and now Juve fans' worst fears have been realised as the club has confirmed (via their official website) Chiesa suffered an ACL injury in the game.
"During yesterday's match, Federico Chiesa felt a blunt trauma sprain to his left knee," a statement read.
"The diagnostic tests performed this morning at J|Medical revealed an injury of the anterior cruciate ligament.
"It will be necessary for the player to undergo surgery in the next few days."
The news is a bitter blow to La Vecchia Signora and Italy, who will both all-but-certainly be without their star man for the remainder of the 2021/22 season.
Juventus coped surprisingly well without Chiesa in the second half of the game against Roma, coming form 3-1 down to win the game 4-3, but will no doubt miss the forward's influence in the coming months as they look to qualify for the Champions League.
It is likely that Dejan Kulusevski will slot into the team in Chiesa's absence, and the club could step up their efforts to sign another forward in the coming weeks - if they can rustle up the finances to do so.
Sassuolo's Gianluca Scamacca has been heavily linked with La Vecchia Signora, but the club are said to need to sell before bringing him in.
The Italian national team will also be heavily hit by the Chiesa injury news, as they will be without the forward for their upcoming World Cup play-off clashes.