Warner has been in scintillating form in Tests as he scored 427 runs in the recent four-Test series against India at 53.37. In fact, over the past 12 months, he has scored 1209 runs at 67.16 with seven centuries in nine Tests.
However, in the 50-over format, Warner has played 11 ODIs, scoring 406 runs at 36.90 without scoring a century in the past year. But Cummins backed Warner to explode in the World Cup starting next month.
"I know speaking to him he thinks he's got some things to prove in one-day cricket, so I expect some things from him."
While Warner is a certain starter at the top of the order, Cummins will have to fight it out with Mitchell Starc and Josh Hazlewood for a place in the playing XI.
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Australia's 15-member squad consists of four specialist fast bowlers, plus medium pace allrounders Shane Watson, Mitchell Marsh and James Faulkner.
"The good thing is all the quick bowlers are very quick bowlers. We can all run in and try and hit the deck and bowl quite quick. On Australian wickets, the WACA and a couple of other grounds that we play at are nice and fast for us and we can run in and try and bowl as fast as we can," said Cummins.
"I think that's going to be our biggest strength in the bowling, having three or four quick guys in the side."