Phil Mustard and Tim Ambrose have an opportunity to impress

Either Phil Mustard or Tim Ambrose will make their Test debut in the first match, which starts on 4 March.

Moores had hinted that Mustard, who did well during the one-day series in Sri Lanka, would be the one-day keeper and Tim Ambrose the Test keeper.

But Moores told BBC Sport on Thursday: "Some spots have not been sorted - it's up to the players to grab the chance."

Matt Prior became England's latest wicket-keeping casualty when he was dropped from England's one-day and Test squads, handing Mustard and Ambrose the opportunity to assert their claims.

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Durham's Mustard is likely to wear the keeping gloves in England's Twenty20 match against New Zealand on Tuesday.

The hard-hitting left-hander showed plenty of promise with the bat at the top of the order during England's one-day series win over Sri Lanka last year, but failed to convert his good starts into significant scores.

His keeping was more impressive, equally adroit standing up to spinner Monty Panesar as he was standing back to England's pace attack.

Moores wants a competitive edge in England's one-day warm-up games

But despite his international advantage over Warwickshire rival Ambrose, Moores said Mustard would need to keep improving to compete for a Test place.

"He kept really well and he had little moments with the bat (in Sri Lanka) - but he has got to build on that," he told BBC cricket correspondent Jonathan Agnew.

"We would like to get that spot (wicket-keeper) nailed down."

Moores also defended using 13 players in England's two one-day warm-up matches against Canterbury, which begin in Christchurch on Friday.

His predecessor Duncan Fletcher was criticised for using a multitude of players in England's Ashes warm-up matches, which often lacked the competitive edge necessary for a tough five-Test series in Australia.

"If you play 11-a-side, you can't really look at options in your squad," said Moores. "The key for me is to take it seriously and not devalue the games.

"If we want to be a successful one-day side, we have to get into the habit of using practice games really well and when we play our first proper game, we are ready to go.

"We have banged home that message to the players."