Brad Haddin may have narrowly missed a place in Australia's squad for the one-day cricket series against the Kiwis, but NSW coach Trevor Bayliss says his selection in this year's Ashes squad is assured.

Queensland opening batsman Matthew Hayden, who has been battling a lung infection, will be given until the last possible hour to declare himself strong enough to fly to New Zealand on Wednesday for a Twenty20 match followed by a series of five one-day internationals and three Tests.

Haddin is in line for a call-up if Hayden withdraws, following the NSW wicketkeeper's stunning 96 not out from 71 balls against Victoria on Sunday.

Bayliss says Haddin, who batted at No.3 against Victoria, could deputise for Adam Gilchrist behind the stumps or play purely as a batsman in Ashes tour matches.

"I think (Haddin's Ashes selection) will be as a second keeper who can bat, very much in the Adam Gilchrist mould," Bayliss told AAP on Monday night.

"He's done enough this year (129 for Australia A v Pakistan and 366 runs at 61.00 in seven ING Cup one-day games) to warrant being a second wicketkeeper.

"I'm looking forward to hearing his name read out for the Ashes tour.

"Not only has he scored a hundred for Australia A (as captain), he's batted well for us and kept well and I'm sure the selectors have taken notice of that.

"Gilly (Gilchrist) has had a few matches off in the past 18 months or so and Brad has been a replacement.

"They make take two wicketkeepers to England but Brad could double as a batsman in some of those tour games. I think he's a very good chance."

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