Atletico Madrid striker Sergio Aguero could be set for a spell on the sidelines after picking up a knee problem.
The 21-year-old Argentine had to be substituted after 74 minutes of Atletico's 5-2 defeat to Barcelona on Saturday night.
He had injured his knee and was also experiencing trouble with his thigh, but more scans will be needed to determine the full extent of the damage.
The initial diagnosis is that Aguero could be doubtful for the upcoming Primera Liga matches against Almeria and Valencia.
There are also fears about whether Aguero will have recovered in time to face Porto in the UEFA Champions League at the end of the month.
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