Kompany, who hasn't played since he lasted only 10 minutes against Real Madrid on May 4, has been given rigorous examinations before playing his first practise match last week. He won't be considered for the derby but Guardiola would like the 30-year-old to play a big part in City's challenge for trophies on four fronts this season.
"What is important is the doctor told me now his muscle is clean," said Guardiola. "Until the blood tests are perfect, he is not going to play with us. You have to avoid a situation that when he starts he gets injured again.
"You have to accept impact injuries because they are part of football but not for the reasons that have happened to Vincent in the last three years.
"He is important for us because he is so good. He is a fighter, working morning and afternoon. He is a big professional so in that sense I don't panic.
"Every day he is improving. He can train now, be part of the group and after we will decide if he is able to play or not.
"We have 10 months in front of us. It is really important now we are in Champions League and playing Barcelona with Messi, Suarez and Neymar, one of the best teams in the last decade."