Guardiola is yet to drop any points with City since his summer arrival
Xabi told Marca: "Pep has an innate talent for understanding football and to enforce through his players what he expects. He loves his players to have the ball and be brave. And you feel this.
"What he's done for City in two months is incredible.
"It is the fruit of his work and that is why he is very demanding and very methodical. The farewell he had at Bayern was very moving for all supporters, players and staff. It is a demonstration of what he has built, of what he brought to a club.
"His years at Bayern have been successful and here they are extremely grateful."