2010/2011 was one of the best seasons in franchise history for Manchester City. They leapt to third in the Premier League, beaten by only Chelsea and cross-city rivals Manchester United, they qualified for the UEFA Champions League and they won the FA Cup.
It has been a remarkable turnaround for a club who finished just four points above the relegation zone four years ago. A large part of their newfound success has been their ability to attract a higher calibre of player, by virtue of their purchase by Sheikh Mansour.
But there are rumours abound that captain and lead scorer Carlos Tevez could be on the move, with sources saying he is keen to move back to South America. The Daily Mail are reporting that Brazilian side Corinthians are confident of landing the Argentinian despite City having turned down their initial offer of £37 million ($59.7 million).
Here are 10 reasons City cannot afford to lose Tevez.
Carlos Tevez finished tied for the top scorer title with Manchester United's Dimitar Berbatov with 20.
In 63 Premier League games with City, he has found the net 43 times. In the same number of games with United, he scored just 19.
Not only is Tevez a great forward, he is Manchester City's only great forward and only legitimate goalscoring threat. He was the only City player to finish in the top 40 scorers last season.
Mario Balotelli and Yaya Toure were the only other players to finish in the top 70, with six goals each.
If Roberto Mancini's team is to have another great season, they will need their only good attacking danger.
Manchester City had one of the best seasons in team history last year. They won the FA Cup for the first time since 1969 and finished third in the Premier League.
Yes, it is a long shot. Yes, it is fairly crazy even to suggest it, but why couldn't Manchester City jump two places in the Premier League and win their first top flight title since 1968?
Defending champions Manchester United and runners-up Chelsea are both older teams who are going to lose (and have already lost) some key players.
They proved last season that third place was not as fanciful a notion as it appeared two years ago, why should 2012 be any different?
On a similar note, Manchester City are in the UEFA Champions League next season, after finishing in the top four in the league, and if they are to make any headway in the planet's greatest club competition, they will need Carlos Tevez
Losing a major player in the summer transfer window is a blow. Losing your captain is even worse.
Carlos Tevez is their best player and one of their emotional leaders (though he does exhibit signs of losing his cool at times).
Another reason you want to keep your captain and your core group as untouched as possible is if you are trying to build up a young team around them.
City have a number of young players like 20-year-old Mario Balotelli, and men younger still coming up through the Academy ranks.
One need only look at the stands at Eastlands to see how much people like Carlos Tevez.
Some probably won't forgive him for his Manchester United past and some will have felt the novelty wear off after his blockbuster move across the city. But by and large, Tevez is a popular figure.
Manchester City, with their ridiculously wealthy and happy-to-spend-money owner, are in a great position to attract players to Eastlands and build on the successes they had in 2011.
They will be buyers not sellers in this transfer window, or at least, they aim to be, and starting off by losing their premier player would be a hammer blow to their chances next season.
Manchester City faced this before, when Carlos Tevez was with Manchester United. They will be loath to experience it again.
They have been the most improved team over the last few seasons and Tevez is a major part of that. They cannot afford to let him leave and undo a lot of that work by playing against them.