Guardiola's first steps into management came with Barcelona's youth team in 2007 before he graduated to the senior set-up in 2008 and became one of the modern coaching greats.
Guardiola called for Sane - who has played just 30 minutes in the league this season - to bounce back, but said it was too early to judge the former Schalke attacker. "It's a challenge for him and not just him - everybody", Guardiola told a news conference ahead of City's clash against Fulham.
De Bruyne is recovering from a knee ligament injury picked up in training, which is expected to keep him out until November, although Guardiola says his recovery is "progressing well". He started in an incredible condition and he deserves to play.
Lionel Messi has been at Barcelona since he was a small boy and during his time at the Catalan club, he has seen hundreds of players come and go. He's so competitive and professional. Bernardo Silva, Gabriel Jesus, Raz [Raheem Sterling] - the other ones are young - and he will grow up. I was delighted watching them.More news: Samsung hints Galaxy A phone with four cameras is coming next month
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Delph, 28, has won seven global caps since he last kicked a ball in anger for City, in the final game of last season.
The Sun reports that the club manager Pep Guardiola disclosed the 27-year-old Belgium global is doing well, but will not be in contention to face Fulham on Saturday.
"The most important thing is to try to help him".
The clause was inserted in the six-year contract the City midfielder signed in January that made him the highest paid player at the Premier League champions. "The club knows my opinion and we share that and after that it is [up to] the club and Raheem's agent. In England there are no release clauses, you have to negotiate for the club".