The Swedish striker joined the Potters on loan from City last month so is forbidden from playing at the Etihad Stadium on Saturday but he feels Mark Hughes' side are good enough to inflict defeat on Manuel Pellegrini's men.
"It's a big game and I hope that they can go there and do well," Guidetti told the Stoke's official website.
"It's disappointing that I can't play in the game, so the next one for me is Arsenal the week after, but before that we have to believe that we can go there and get a positive result.
"I have a great amount of trust in the team here and I trust in the manager and everyone else here too. They're great at what they do and they know how to win matches in the Premier League.
"The manager has lots of experience having played and scored many goals in this league and he's coached a lot in this league too, so he knows how to get a result in these sort of games.
"We have beaten some of the big teams already and it was goalless in the match at the Britannia Stadium earlier in the season, so I trust we have enough quality to do well."
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