City lost 3-1 to Tottenham on Sunday afternoon, meaning United can win their 20th league title by beating Aston Villa at Old Trafford.
But Mancini was bullish in his post-match observations, not only regarding United's quality but also his own future at the Etihad Stadium
"They have been the better team. They are not better than us but they deserve to win this title. We lost a lot of points in games when probably we didn’t deserve to lose. United have won more games and scored more goals," he told reporters.
"Every time we play United, we are better. Even when we lost in the last second [in the 3-2 loss in December] we dominated the game. We don’t need to close the gap.
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"I shouldn’t explain anything [regarding his future]. We have another five games now and the FA Cup final. If we win the FA Cup and come second and it isn't good enough - then all the other managers should be sacked.
"If I have a chance to talk to the chairman, I will explain. We don’t need to sit down now, or in two or three weeks."
But the Italian did admit he was far from pleased at how the campaign has panned out, and revealed that he occasionally thinks his team's own form has contributed in the title likely returning to Old Trafford.
"Sometimes [I think we gifted them the league]," he added.
"I’m not happy because I like to win championships. That was our target when we started the season. I'm not happy with the season because I always want the maximum.
"We wanted to win this championship, but we didn’t. When another team is better than you, you can only say many congratulations.
"They had better attitude because they lost last year. They improved the team in the summer, they scored a lot of goals.
"We deserve to have more points. It’s useless now to talk about the past. Now we have time, there are good players on the market. We need to improve our team but this is normal. Every team wants to improve."
City had gone ahead early on at White Hart Lane, with Samir Nasri scoring in the fifth minute, but Andre Villas-Boas' men came roaring back with three goals in seven second-half minutes to put themselves back in the frame for a top-four finish and all but end City's defence of the title.
But Mancini was once again reluctant to accept the loss: "I think we deserved to win this game," he continued. "Instead we are talking about a defeat. We did two big mistakes which isn’t usual for our team
"It’s not easy to play here against Tottenham. To come here and play like we did today is not easy.
"We made two big mistakes. For 75 minutes, we didn’t concede any chances and had two or three chances to score.
"We had the game under control. I think it’s our fault we lost this game. With our players we can’t concede goals like today."
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