Reijnders made the switch from AC Milan to England this summer and has made an immediate impact, scoring and assisting in Saturday’s Premier League opener.
After the match, his manager described him as exactly the kind of player City need in the league.
"Not just today, in Palermo (a 3-0 pre-season win) he played really good," Guardiola told BBC.
"He is a typical player we need in the Premier League. He is an incredible, big signing for us.
"His work ethic, a holding midfielder occupies a lot of spaces and then after the control with the ball and his movements. And then he is trying to get in behind and score - really pleased."
Guardiola and Reijnders will aim to build on their strong season start when City host Tottenham at the Etihad next Saturday.