The Columbia international, who has been heavily linked with a move to Chelsea, was forced to sit out Los Rojiblancos' narrow victories over Viktoria Plzen in the Europa League, and Espanyol in La Liga, according to AS.
Falcao has scored seven goals already this season, making him the league's current top scorer, ahead of both Lionel Messi and Cristiano Ronaldo, who have scored six times each.
|BACK WITH A BANG|
|3/1||Falcao is 3/1 with Paddy Power to open the scoring against Malaga|
The 31-year-old is now set to undergo tests to determine the extent of the injury.
Gifted starlet Kader, 20, trained alongside the first team, though, and could now be set to make his second start for Atletico.