Arsenal boss Arsene Wenger concedes money can help a club win trophies.

The Gunners entertain Roman Abramovich's Chelsea today.

"I believe when you have mega-money you can do what you want but only because you can correct the mistakes," Wenger told arsenal.com.

"If you buy five wrong players and have the money, you can pay the five off and buy five new ones.

"If you have to respect your budget, every mistake you make costs money and you have to be able to afford that."