The striker was stretchered off in Manchester City's opening game of the season, and though he says his knee is sore, he insists he could be fit to face Peru next week.
Aguero has been ruled out of action since he injured his knee in the opening game of the season against Southampton, when he was stretchered off the pitch after only seven minutes.
However, the 24-year-old flew back to his home country to be assessed by his national team's doctors, and did not rule out representing his country next week.
"I'm here until the Peru game," he told reporters. "Today, the knee still hurts and it bothers me, but things might change in two or three days. I will see the doctors of the Argentine FA."
Although Roberto Mancini was not allowed to stop Aguero from flying to Argentina, the Manchester City boss has in the past voiced his frustrations regarding the FIFA rule that means players must be allowed to be assessed by national team doctors.
The Italian stated on Aug. 24: "It is ridiculous. These are the rules and we need to respect these rules, but they are ridiculous rules.
"It's impossible because Sergio needs a minimum of two weeks without training and then maybe he can start again. He can't go [to Argentina]."
Even though Aguero has been selected for the Argentina squad, coach Alex Sabella will not make any decisions about the fitness of the 34 million pounds striker until the weekend.
Even though Manchester City is said to be annoyed with the situation, the club has ensured that a good relationship is kept between the Argentinian FA and the Premier League club.