Outside Manchester City's Etihad Stadium is a lustrous silver statue of Sergio Aguero - mouth agape in ecstasy, kit swirling over his head - depicting his goal celebration after securing the club's first Premier League title.

It is the immortilisation of the most famous goal in English league football history, when City snatched the trophy away from Manchester United in the dying seconds of the 2011-12 season.

But what if the goal never happened? What if Aguero had never played for the club? What if City had opted to abide by football's financial rules instead of purposefully breaking them through a "disguised funding scheme"?

The revelation that the club has been found guilty of the charges brought against it by the Premier League three and a half years ago has left football fans around the world questioning the legitimacy of City's achievements between 2009 and 2018, when they were the most successful club in English football and cemented themselves among the global game's elite.

Some fans are referring to it as the asterisk era, and there is a possibility City could be retroactively stripped of the honours they earned during the period, with some clubs seeking legal advice over potential financial compensation.

So how exactly did City's "hugely overstated" income impact their actions in the transfer market, how key were the players who were brought in, and what does it all mean for both the past and the future?

Manchester City spent about £1.2bn on new players in the transfer windows between summer 2009 and January 2018.

In that time, the club won seven major trophies - three Premier Leagues, one FA Cup, and three EFL Cups - having previously gone without a significant honour since 1970.