Having enjoyed a fine preseason, Stones suffered a thigh injury that has kept him out since the win over West Ham on the opening day of the Premier League campaign.
And Jesus has missed the wins over Bournemouth and Brighton after picking up a hamstring strain in training.
“Gundogan had a stomach problem but he trained good in the last two days.”
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A metatarsal problem, followed by successive knee injuries, restricted Mendy to just 15 appearances in our Fourmidables campaign and he missed our tour of Asia in order to focus on regaining his fitness.
He is now back in training and looking sharp, but Guardiola admits given the extent of his recent setbacks, his reintroduction to the side will need to be carefully managed.
"He’s good, he’s training and delighted," Guardiola said. "Last two weeks, three weeks he’s training and everything is going well.
"Knee’s reacting well so hopefully in the next few games he can be involved.
“With what happened in the last two seasons we want to be careful and be sure when he starts to play. One thing is training, the other is higher competition."
The boss also gave us an update on Leroy Sane, who suffered a knee injury 12 minutes into our Community Shield victory over Chelsea.
Guardiola says he is now back at the CFA to complete his rehabilitation, with a return early in the new year likely.
"He’s coming back before the end of the season," Guardiola said. "In January, December, February could be perfect. He should be perfect.
"He came back two days ago he’s here with us and hopefully he came back well."