World champions in Tests and one-dayers but considered duds in Twenty20, Australian skipper Michael Clarke says his side's win over Pakistan in the World Cup has shown how much it has improved in the game's shortest format in the past one year.

"There's extra motivation from within the squad, we want to perform better in Twenty20 cricket then we have in general. I think our form has improved over the last 12 months and we've started really well," Clarke said after the 34-run triumph over Pakistan last night.