Monaco forward Radamel Falcao is awaiting expert opinion on the left knee injury he sustained on Coupe de France duty for his club on Wednesday.
Falcao was forced off in the last-32 cup match against fourth-tier side Monts Or Azergues, after a challenge from Soner Ertek. He had scored the opening goal and Monaco went on to win 3-0.
Reports in France have suggested the Colombian could face a long absence from the team, and may also be in danger of missing the summer's World Cup.
Monaco are not leaping to such conclusions and will put Falcao through stringent tests to determine the nature of the injury. It remains to be seen whether Falcao's setback affects striker Lacina Traore's proposed loan move to Everton, which has appeared close to completion.
"Radamel Falcao has been injured on his left knee," Monaco said in a statement. "We must wait for follow-up tests in the coming days to be precise about the exact nature of the injury."
Should Falcao be ruled out for a long stretch, it may be an option for Monaco to retain Traore, who recently joined from Anzhi Makhachkala but looked set to be immediately farmed out to Premier League outfit Everton.
Monaco manager Claudio Ranieri was angry with the match officials for not clamping down on what he felt were roughhouse tactics from Monaco's lowly opponents.
"On many occasions, before the injury to Radamel, I drew the attention of the fourth official to the hardness of the game which was beginning to develop and on the danger that it posed to the players," Ranieri said on Monaco's website.
"I wasn't listened to and that's unfortunately not the first time that we have paid the consequences. It's very regrettable for French football, the players who make the game are not protected well enough by the referees."