Falcao needs surgery on left knee
Radamel Falcao is in danger of missing the World Cup following confirmation he will need surgery after suffering anterior cruciate ligament damage.
The prolific Colombia international sustained the injury during Monaco's Coupe de France tie against Monts Or Azergues on Wednesday night and he underwent tests on Thursday.
The results of those tests have confirmed the extent of the damage to his left knee and Monaco have announced that Falcao will now need an operation
Monaco have not said how long Falcao is likely to be absent for, only that doctors would try to help the striker recover as quickly as possible.
However, there must be real concern now for Falcao and Colombia that he will be ruled out of this summer's World Cup finals in Brazil, with recovery time for a serious ACL injury typically between six and nine months.
A club statement on asm-fc.com read: "Following the injury suffered on Wednesday, Radamel Falcao has had medical tests. It appears that the player has a lesion of the anterior cruciate ligament in his left knee.
"An operation will be necessary in the coming days. The doctors will therefore make every effort to allow Radamel Falcao to recover as quickly as possible."
Falcao was forced off at half-time of 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.
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."
Falcao has scored 11 goals in 19 matches in all competitions for Monaco this season after joining the big-spending Ligue 1 club in a reported £50million move from Atletico Madrid last summer.
If he is ruled out of the World Cup, the 27-year-old's absence would be a huge blow for Colombia.
He scored nine goals in 13 matches in qualifying - two goals less than top-scorer Luis Suarez of Uruguay - as Colombia booked their spot in Brazil this summer as runners-up to Argentina in the South America section.
Colombia have been drawn alongside Greece, Ivory Coast and Japan in Group C of the World Cup and begin their campaign against the Greeks on June 14.
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.
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.