Atletico Madrid's Argentine striker Sergio "Kun" Aguero will miss tomorrow's league match at Sevilla after a training injury, the club said.
Aguero suffered an injury to the gluteus maximus muscle of his left buttock during a training session yesterday, Atletico said in a statement on the club's website today.
It said he had undergone an MRI and had begun treatment.
The club said the injury meant Aguero would not join the squad to play at Sevilla.
The sports newspaper Marca said on its website that the 22-year-old hopes to return for the club's next league match, against Getafe in two weeks.