Wenger expects improvement

City has splashed out £80 million ($139.06 million) on four players so far this northern summer in a bid to break into the top four and secure UEFA Champions League football.

Tottenham Hotspur manager Harry Redknapp believes it is only a matter of time before City's financial clout carries it to the Premier League title.

Arsenal, in contrast, has spent just £8.5 million ($14.78 million) on defender Laurent Koscielny while Moroccan striker Marouane Chamakh moved to the Emirates on a free transfer.

But Wenger is convinced Arsenal will improve on last year's third-place finish.

"I am very confident [we'll do better than last season]," Wenger told the club's website.

"We know in England that the Premier League is the biggest league in the world and everybody invests a lot of money.

"We invest in our work, in our beliefs, in the quality of our behaviour and I am confident that will pay off. "We finished third last year and we hope we can improve on that - but the race will be tough."

Arsenal's pre-season preparations continue against AC Milan in the Emirates Cup.