"It's a challenge for him and not just him - everybody", Guardiola told a news conference ahead of City's clash against Fulham.
'Leroy was so important, is so important, and will be so important for the club.
Stones suffered an injury that ruled him out for most of April but, even so, since mid-February he has played just 433 minutes in the Premier League for City and more than double that figure, nearly 1,110 minutes, for the England team.
De Bruyne suffered lateral collateral ligament injury while training with City teammates in August and was ruled out of action for about three months. He's a nice guy and I don't have any bad words about him. He's so competitive and professional. Some players at the end of the season go down.
The 23-year-old was also hoping that a strong personal showing in Russian Federation might strengthen his bargaining position.
"But this season, Bernardo Silva was the first one. The most important thing and the most important issue we have is to help them to grow".
"It's a challenge for all of them and a challenge for me and them is to keep that level. I'm pretty sure they'll have a good season".
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A tropical wave in the Gulf of Mexico is still being monitored, but its chance of development in the coming days has decreased. The centre of Isaac passed between Martinique and Dominica with maximum sustained winds of about 45 miles per hour .
Guardiola also dismissed the suggestion Sane's gametime has been limited due to Benjamin Mendy's re-emergence into the starting line-up. "No doubt about that".
Speaking on Bein Sports, Guardiola also revealed he would like to manage a national team in the future.
"It's well-known we're delighted with him and would like him to continue", said Guardiola. We took it on with some incredible players, a young president (Joan Laporta), Txiki (Begiristain).it was a generation of brutal players and the best player in the world (Lionel Messi).
"He's ready and after it's the same case as Leroy".
"He's a top player. You have to negotiate with the club".
'He's special, his work ethic is excellent, he will have a lot of minutes this season and after that Gareth has his own decision'.