The former Crystal Palace was thrown straight into the starting XI for the 2-0 win on Saturday.
Guehi told City's website afterwards: "It’s good, it’s good, I don’t want to get too ahead of myself. But I’m thankful for the opportunity and thankful to be at the football club. It’s not bad, it’s good.
“It’s just the mentality of the team since I walked in, you can feel that intensity and that willingness to win.
“So it’s not even my block, it’s just an emotion that through me is what the whole team is feeling at the moment.
“it’s important to put those blocks in and get those goals however we can to get the win.
“It’s (Etihad Stadium) fantastic. The fans were great. The atmosphere was fantastic, the stadium is beautiful. So yeah it’s fantastic.”