Argentina midfielder Fernando Gago is doubtful for the World Cup after suffering a left knee injury at the weekend which is expected to sideline him for two months.

The 28-year-old former Real Madrid man, who has won 47 caps for La Albiceleste, picked up the knock in Boca Juniors' goalless draw with Santa Fe on Sunday.

A statement on club website www.bocajuniors.com.ar read: "The midfielder suffered a grade two sprain in the left knee, with a partial lesion of the medial collateral ligament, and will be immobilised for 15 days. The estimated recovery time is 60 days."

Argentina begin preparations for the World Cup on 20 May and play their first Group F match against Bosnia-Herzegovina on 15 June before further first round games against Iran and Nigeria.