Players can still leave the Premier League before the end of this month but no-one can now come in.
The inspiration behind Leicester's shock title triumph two seasons ago, the 2016 PFA Player of The Year joins an embarrassment of attacking riches at the Etihad as the champions bid for back-to-back Premier League titles.
Tottenham Hotspur were the only team to register a zero net sales/receipts, with no activity in the transfer window.
Michael Owen is "convinced" that Liverpool FC will be Manchester City's closest challengers in the Premier League title race this season. Harry Kane committed his future to Tottenham before heading to the World Cup and finishing as England's top-scorer as the national team reached the semi-finals.
Capable of operating in a variety of positions across the frontline, Mahrez brings quality and versatility to a squad looking for success both at home and in Europe.
Across the League, 108 of our clubs' players took part in the World Cup, with 27 of the 32 competing nations having a Premier League player in their squad.
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Tottenham, who have achieved three consecutive top-three finishes under their highly regarded manager Mauricio Pochettino, are still paying for a lavish state-of-the-art new stadium estimated at over £800m and it would appear the mounting cost prevented the club splashing the cash on new players at the same time.
The club has however released a statement on the current injuries it has ahead of their match against Pep Guardiola's men.
Asking for a full explanation, the statement said: "We do not believe in spending money or signing players for the sake of it".
He added that he feels Manchester City will simply be too good for their rivals, commenting: "I said at the end of last season that to go down as an all-time great team, they need to be serial winners and defend their title, and I think they will do that".
The global nature of our competition - where the best of the UK's talent competes with and against some of the best worldwide players - is something we celebrate.