Guardiola told reporters at his press conference on Friday: "We try to build the best squad as possible for the long season. We are going to see how the market finishes.
"If we have to stay with the players we have right now we are happy, if someone comes we are happy too. I know how good the club works since I've arrived here and we try to do our best, sometimes it's possible, sometimes not.
"Every season I start I always believe my players are the best, but we talk with the club, with the sporting director Txiki [Begiristain], with all the players. Everyone has their own opinions and after that we decide what is best to make our club stronger."
City began the Premier League campaign with a 2-0 win over Brighton & Hove Albion and will host Everton on Monday.