MANCHESTER, England (AP) — Manchester City’s ruthless run to the Premier League title can be traced back to the morning of February 6, when the club was hit with more than 100 charges of financial wrongdoing.

City has not lost a game in any competition since then and is on track to win three trophies, having also advanced to the finals of the Champions League and the FA Cup.

But even if the accusations made by the Premier League appear to have marked a turning point in potentially the most successful season in the club’s history, they continue to cast a cloud over City’s years of dominance in English football.

City has been England’s leading club for more than a decade thanks to the lavish backing of Abu Dhabi’s ruling family. The club was bought by Sheikh Mansour bin Zayed Al Nahyan in 2008.

The latest title triumph was the club’s fifth in six years and seventh in the past 11.

On Sunday, as City celebrated with its fans at Etihad Stadium — named for a sponsor deal with the state airline in Abu Dhabi — there was no sign that the off-field issues were causing undue concern to supporters or players.

Instead, against a backdrop of blue smoke and explosions of ticker tape, the trophy was lifted to rapturous cheers and City manager Pep Guardiola spoke of his goal to lead the club to its first Champions League title against Inter Milan in Istanbul on June 10.

“We have the feeling we have done something exceptional in terms of the Premier League, but of course to be considered one of the greatest in Europe we have to win the Champions League,” said Guardiola, who has won 10 major trophies in seven years at the club. “Otherwise people will say our time here is not complete.”

City’s ongoing supremacy, however, is leading some to look again at the charges against it, with one column in a British newspaper last week asking whether it was “the greatest team or one built on years of cheating?”

City is accused of providing misleading information about its finances over a nine-year period from 2009-18 — a span in which it won three titles and signed some of the world’s best players, like Yaya Toure, Sergio Aguero and Kevin de Bruyne.

During that time, City changed the landscape of European football by becoming one of the most powerful teams in the sport. The club’s exorbitant spending has provided the foundation for the unprecedented success, and prompted questions about whether anyone can halt City’s dominance.

The Premier League charges came after a four-year investigation and the publication of leaked emails and documents, likely hacked, that were published starting in 2018 by German magazine Der Spiegel. The documents allegedly showed attempts to cover up the source of the club’s income in a bid to comply with Financial Fair Play rules operated by European football body UEFA and the Premier League.

UEFA created its rules after the global financial crisis 15 years ago to monitor revenue and spending of the clubs playing in European competitions like the Champions League.

The aim was financial stability in the industry by ensuring that spending was balanced with earnings, which included not inflating sponsor deals with companies linked to club owners. Critics said the rules protected storied clubs with huge fan bases from challenges by emerging rivals with wealthy owners, such as state-backed Man City and Qatari-owned Paris Saint-Germain.

If found guilty by the Premier League investigation, City faces punishments as severe as a deduction of points or even expulsion from English football’s top division.