CORDOBA, Argentina -- Manchester City striker Sergio Aguero will cheer on Argentina's national team from Buenos Aires.

On Wednesday, Argentina Football Association doctors advised Aguero to stay home and rest as Argentina heads on a chartered flight to Cordoba for Friday's World Cup qualifying match vs. Paraguay.

"A pity I can't be there, but the doctors counseled me to keep resting and that is why I am not traveling to Cordoba with the team," Aguero tweeted. "From the outside, one suffers more, but I will be like everyone, cheering the team on full. Let's go Argentina."

Aguero is recovering from a knee injury he suffered after falling in City's opening Barclays Premier League match vs. Southampton on Aug. 19. Injury aside, the 24-year-old is obligated to sit vs. Paraguay as he is serving the suspension from his second yellow card received against Ecuador this past June.

Aguero is cleared to play Peru on Sept. 11 and hinted earlier this week that he could play.

"The knee still hurts at the moment and it bothers me, but maybe in two or three days the landscape will change," Aguero told reporters last week in Argentina. "Now I'm going to see the doctors of the Argentinian Football Association."

The Barclays Premier League champion expects to be without the forward until mid-September at the earliest.

Argentina coach Alejandro Sabella nevertheless included Aguero when he announced his squad for the World Cup qualifiers against Paraguay and Peru on Friday and Tuesday respectively -- a decision labeled by City boss Roberto Mancini as "ridiculous".

Aguero has now risked further upsetting his club by suggesting he could even feature against Peru if the knee progresses well over the next few days.

Mancini accepted Argentina had a right under international rules to call up Aguero -- and carry out its own medical evaluation if necessary -- but claimed it was a ludicrous situation.

Speaking on Aug. 24, soon after the squad was announced, the Italian said: "It is impossible because Sergio needs a minimum of two weeks without training. After two weeks he can start again.

"If in one week if he could be ready to play it is different, but I think he needs another two weeks," he said. "He can go and fly back quickly. These are the rules and we need to respect them -- they are ridiculous rules."