The Brazil striker has been out since suffering ligament damage in the Premier League leaders' goalless draw at Crystal Palace on New Year's Eve.
"Today he is going to play in part of the session, it's good news", Guardiola told a news conference. I don't know when he'll be ready.
Monday night's FA Cup clash at Wigan may arrive too soon for the Brazilian but the Blues will be buoyed by the fact he is closing in on a return.
Benjamin Mendy is the only other player missing, with the defender still recovering from a cruciate knee ligament injury.
"The knee is a very complicated part, even more so as I've never had an injury there".
'I think in the FA Cup there are a lot of surprises, not just this season or previous seasons, but all throughout history you always have these kind of situations happening'.
"I think I respect what he does because he has a clear vision of the game, he has a positive attitude, a positive philosophy".
"It depends between the games", he said, when asked whether he finds it hard to balance the team's momentum with the players' need to rest.
"It would be good if the players do not think too much about the final next Sunday; they think about the final next Monday [the Wigan game]".