Atletico Madrid's Portugal forward Joao Felix is likely to miss thos weekend's derby clash at Real Madrid after being diagnosed with a muscle injury on Wednesday.
The 126 million euros ($139.78 million) club-record signing suffered the problem in Sunday's 0-0 draw with Leganes and did not train ahead of Saturday's match at the Santiago Bernabeu.
"Given the ongoing pain after a rest day, the club's medical services performed tests to diagnose the injury," Atletico said in a statement, without saying how long he would be sidelined.
The 20-year-old Felix has struggled to make an impact with Atletico as Diego Simeone's side languish fifth in La Liga, 10 points adrift of leaders Real Madrid after 21 games.
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