City lost 1-0 to Roberto Martinez's men thanks to a late Ben Watson goal, but their manager believes that while his side were not at their best, they were still unfortunate not to win the match.

Mancini, who will end the season without having won a trophy, said his team's inability to take the chances they created is what cost them.

"I'm disappointed. We conceded a goal in the last seconds in a game where we didn't play very well, but we didn't deserve to lose. But that's football," he told BBC 5 Live.

"We started slowly but we had two incredible chances in the first half but didn't score." 

Mancini added that he was pleased for Wigan, especially their boss Martinez and chairman Dave Whelan.

"In the end Wigan won and I am happy for Wigan, Martinez and his chairman," said the Italian.

"Martinez is a good man and a good manager. If we couldn't win I'm happy he won this cup."

The defeat is likely to increase the pressure on Mancini, with reports suggesting Manuel Pellegrini may be in line to take his job at the Etihad Stadium. 

However, the current City boss described such rumours as "rubbish" after the match.