'We have very good midfielders, but maybe a midfielder with different characteristics [would be a good fit]'.
Others will be missing, however, with Kevin de Bruyne and Raheem Sterling not due to start training until Monday after the World Cup delayed their summer break.
Fourteen of his 15 appearances in Spain's top flight came off the bench but his displays during pre-season have convinced Guardiola that Douglas Luiz could provide the extra midfield body instead of prime target Jorginho, who opted to join Chelsea and his former Napoli boss Maurizio Sarri.
The manager has confirmed his record £60 million ($78 million) signing is in contention to start the match after he was forced off during last weekend's final match of the USA pre-season tour against Bayern Munich.
"It's the Community Shield, the players know I'll prepare like it was the best final we have to play, so seriously, to try to know as much as possible about Chelsea, right now, and Hudson-Odoi, the new winger - he's so fast", Guardiola said.
"I would like to thank the fans for the welcome and for how well they have treated me", he told the club's website.
Chelsea have changed their head coach with great regularity in recent years but Sarri does not want his stay at Stamford Bridge to be a short one.
"I can assure you and the players it will happen every single game".
"Always Chelsea is a big rival".
"The way he plays, I think will be flawless for English football. At this point of the season it is important the performance, we have to improve up close". I think we need something, but maybe only a player.
"At the moment Courtois is the goalkeeper of the club, of Chelsea", Sarri added. "I want to win, because it is very important to have a trophy immediately".
For Chelsea, Cesc Fabregas is a doubt with a minor knee injury.
Thibaut Courtois is due to return to Chelsea training this weekend after helping Belgium finish third at the World Cup and being voted the best goalkeeper at Russian Federation 2018.