<p><br /> Arsenal manager Arsene Wenger accepts rival clubs cannot berate Manchester City for trying to buy the Premier League title, but warned there is "no given formula" for success.<br /> </p><p><br /> Since Sheikh Mansour bought the Eastlands club from Thaksin Shinawatra in 2008, around a staggering £1 billion has been invested by the Abu Dhabi-based owners.<br /> </p><p><br /> Yet for all their big spending, Arsenal - who sold both Emmanuel Adebayor and Kolo Toure to City in July 2009 - would move above City back into second place with victory at Emirates Stadium on Wednesday.<br /> </p><p><br /> Leaders Manchester United, Tottenham and Chelsea also all look set to have their say in what is shaping into the most exciting title race of recent seasons.<br /> </p><p><br /> "What is fantastic in football is there is no given formula," Wenger said. "I personally am a big fan of the way we do it, so I try to be successful with the way we do it.<br /> </p><p><br /> "You can also do it the way Inter [Milan] do, or Manchester City do, they buy the best players in the world and it works as well. What I want to show is it works our way as well.<br /> </p><p><br /> "It does not annoy me [the other way], as long as they respect the rules. At the moment, the rules are like that and they respect them, so you cannot fault them."<br /> </p>
