Barcelona striker Sergio Aguero has been ruled out of action for 10 weeks, the club said on Monday, deepening the Catalans' troubles ahead of the new season following Lionel Messi's shock departure.

Football: More problems for Barcelona as Sergio Aguero ruled out for 10 weeks

Manchester City striker Sergio Aguero will be out for perhaps as much as a month, coach Pep Guardiola told a press conference in Marseille on Monday. City will be without the Argentine on Tuesday against Marseille in the Champions League.

Aguero out for up to a month says Guardiola

Manchester City forward Sergio Aguero underwent knee surgery under Dr Ramon Cugat in Barcelona on Wednesday as the Argentina international said that the operation went well.

Sergio Aguero's knee surgery goes well, expected to return in August