Andrew Strauss conceded England picked the wrong team after losing to Australia by 46 runs in the second one-day international.
Captain Strauss felt his attack was a seam bowler light and as a consequence allowed Australia, led by Shaun Marsh's 110, to twice recover from trouble and post a score of 230.
England lined up with spinners Michael Yardy and James Tredwell in Hobart with a view to giving them match practice ahead of the World Cup in the subcontinent.
But the plan backfired and the tourists were then bowled out for 184 in reply to fall 2-0 in the seven-match series, which continues in Sydney on Sunday.
"We will have to regroup pretty quickly for Sydney," Strauss told Sky Sports.
"We were probably a seamer short to be honest. We have to look at what we did wrong today.
"We might not have set the field so far back for Marsh at the start of the powerplay.
"You always look back at things when you have lost, ultimately we put ourselves in a good position with the ball and we should have been better with the bat as well.
"The World Cup is in the back of our minds, there's no doubt about it, but we've got to pick the right team for the conditions and we probably didn't do that today."
England's attack had the hosts on the rack at 33-4 and again at 142-8 but the combination of Marsh and Doug Bollinger (30) helped them to a defendable total.
"When you're chasing 230 you need one guy to get 80-odd and you're there and none of us did that," added Strauss.
"The run rate was creeping up as well, so we weren't as busy as we could have been and that created pressure later on.
"It's disappointing from our point of view, Shaun Marsh played exceptionally well. We still could have chased 230 but we didn't go about it very well.
"We lost early wickets and none of our batsmen played that anchor role that Marsh did for Australia."
Left-arm paceman Bollinger followed his batting heroics - his previous highest score in 27 one-dayers had been three - with a haul of 4-28.
"(The most enjoyable part) was definitely the bowling - being an all-rounder is too much work, you've got to be fit!" Bollinger said.
"It doesn't happen like that for me very often so I'll take it."
And Marsh, who put on an Australia ninth-wicket record of 88 with Bollinger, was full of praise for his team-mate.
"I had great confidence in Doug, he came out and gave us a chance and we came out and bowled really well." he said. "Dougie led the way and it was a great win.
"Doug was OK on his own, he did a fantastic job today."