By FOX SPORTS Staff
City, who won the Premier League last season, have been disappointing this campaign, losing the title to arch-rivals Manchester United and getting knocked out of the Champions League during the group stages.
The Citizens' numerous abject displays this season have left fans disillusioned and many believe City will never be able to rival United's consistency in achieving success.
However, Kompany insists City are no one-hit wonder and claims his side will prove their doubters wrong by winning the Champions League in the near future.
"The same questions were asked about the Premier League and we did it," Kompany was quoted as saying by the Sun.
"It's inevitable we will, when you see the investment that's been made.
"I'm talking about the infrastructure for the young players. It's more than just the players on the pitch.
"There's an enormous amount of work going on and maybe we're more competitive on a European level behind the scenes. But on the pitch, it will come."
Roberto Mancini's men still have a chance to end their season with a trophy as they take on Wigan in the final of the FA Cup in May.
City's next fixture sees them take on West Ham in the Premier League on Saturday.