Filipe had to come off in the 60th minute of Atletico’s 3-2 win over Real Valladolid on Saturday although no timescale has been given for his return.
Atletico play Espanyol in La Liga on Saturday before the two-week winter break.
“Filipe Luis underwent an MRI scan on Monday morning which revealed a Grade 1 injury to the muscle in his right thigh,” a club statement said.
Filipe’s absence continues a recent spate of defensive injuries for Atletico, who are already without Lucas Hernandez and Jose Gimenez.
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