City played in the final of Europe’s premier club competition for the first time in its history in May but failed to win the top prize, losing 1-0 to English rivals Chelsea.
However, Guardiola has praised the journey to the final, which consisted of 11 wins and a draw, as an achievement and not a failure.
The Manchester-based team won a group that consisted of Porto, Olympiacos and Marseille, and beat Borussia Monchengladbach, Borussia Dortmund and 2019/20 finalists Paris Saint-Germain on the road to the last fixture on the competition’s calendar.
“People can say Man City was a failure but it was an incredible achievement last season, playing really well in many of the games and losing well against a big contender,” Guardiola said.
“Every time I start this competition with drive. I’m incredibly happy here. Man City made a step forward last season, we improved a lot. We had 13 games and we won 11.
“We played incredibly well in Porto [in the group stage] when we drew and deserved to win. We lost the final.
“Now we start a new one and every team wants to win. We’re going to try but I won’t tell you which team is going to win because I don’t know it.”
Manchester City enter this year’s competition as joint-favourites in the eyes of the bookmakers alongside slain semi-finalists from last year, PSG, at 7/2.
City have yet to add a European trophy to the collection that only swells with each passing season.
They begin their quest for a first-ever piece of silverware on the European stage when they face German outfit RB Leipzig on Wednesday, September 15 at 8 pm.