The striker was substituted at half-time during Argentina’s game with Nigeria on Tuesday and taken to hospital for tests after suffering a dizzy spell.
But he returned to Manchester on Wednesday as planned and Pep Guardiola says he is in contention to face the Foxes at the King Power Stadium on Saturday.
“He arrived two days ago and the doctor says he’s perfect,” Guardiola said.
“He was conscious all the time in Argentina and he’s okay. Nothing to be worried about.”
Meanwhile, captain Vincent Kompany is close to recovering from the calf injury that his kept him out of the side since the win over Bournemouth in August.
He suffered the problem on international duty with Belgium but he is back in full training and could come in for the suspended Nicolas Otamendi at the King Power Stadium.
Guardiola also confirmed that Raheem Sterling’s back injury has improved significantly - but says Fabian Delph remains a doubt with a calf problem that kept him out of England duty for the recent games against Germany and Brazil.
“I have something in mind to replace Otamendi,” Guardiola said.
“We have Mangala, maybe Kompany can come back. Kyle [Walker] can play there.
“Delph I don’t know if he will be able because in four sessions he trained two. Hopefully we can recover him because he is so important.
"Raz had big problems in the last period - he played the last two games with pain in his back and made a huge effort to play against Napoli and Arsenal - but he is much, much better and hopefully he can play.
"He is much better than before.”