Barcelona have lost Lamine Yamal for the remainder of the year.
Okdiario says Yamal's ankle injury suffered in Sunday's home defeat to Leganes has been diagnosed as a ligament strain.
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Barca announced: "First Team player Lamine Yamal had trauma to his right ankle during yesterday's game against CD Leganés. Tests this morning have shown a grade 1 lesion of the anterior intertibio-peroneal ligament.
"The approximate withdrawal time will be between 3 and 4 weeks."
Yamal had been playing for a month after his previous ankle injury, which kept him off the field for several weeks.
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