The 19-year-old is yet to start a Premier League game for the Sky Blues in 2019/20, making a total of four appearances in all competitions. Nevertheless, he is held in high regard by both his coach and the clubs hierarchy, with the England Under-21 internationalÂ earmarked as the long-term successor to David Silva once the Spaniard leaves next summer.
Foden struck his first goal of the campaign asÂ â€‹CityÂ downed Dinamo Zagreb 2-0 in early October, his stoppage time arrow sealing a second straightÂ â€‹Champions LeagueÂ victory for the Cityzens.
Speaking to theÂ â€‹SunÂ about the youngsters situation at the Etihad Stadium, Guardiola stated: "We didnt give Foden a new contract by accident.Â He is the only player that cant be sold under any circumstances - the only one. Not even forÂ â‚¬500m.
"Phil is going nowhere - Phil is City. We wont be signing anyone else for that position.Â When David Silva leaves, we know exactly who our new magician will be.Â Hes grown up with us. Hes one of us and he is going to be brilliant - one of theÂ â€‹Premier LeaguesÂ best.
"Its better to take things slowly," Guardiola explained. "One thing is clear: Foden has a place in Citys first team.Â Id be interested to see if a different manager would have given him his chance to develop, or loaned him out.
"I dont like leaving him out of certain games, but I must think of the whole squad. Phil understands that."
The Catalan has allowed fellow academy starlets Jadon Sancho and Brahim Diaz to leave Manchester in recent years, the former joiningÂ â€‹Borussia DortmundÂ in 2017, before his counterpart switched toÂ â€‹Real MadridÂ in January last season.
However, he chose to fast-track Foden into the senior setup, affording the playmaker time to continue his development andÂ adapt to the demands of elite-level football.
For more from Ed Alexander, follow him on Twitter!