"It's something that I haven't coped well with in the past when I've not been quite 100 per cent", he said.
But the perception that standards have slipped is taking hold as the Championship has been pushed to the margins of the season, more and more players are withdrawn for England duties at various levels, top overseas players are increasingly hard to find and many young professionals put a growing emphasis on the Twenty20 game.
"The worry for me is there's a lot of cricketers I think at the moment playing county cricket who are not looking or ambitious enough to think, "Right, hang on a minute, I want to play cricket for England".
Lancashire right-hand batsman Liam Livingstone has been included in the squad for the first time while Durham seamer Mark Wood has been recalled with Tom Curran missing out. "The past couple of games I've just been backing myself". He played extremely well'.
"Even though it was a full-strength England team I felt confident out there [I] was able to back my skills".
"It's good timing for us, winning the Ashes and coming to this one-day series", Stoinis was quoted as saying by Sky Sports.
Morgan was speaking after England beat a Cricket Australia XI by five wickets in Sydney.
Ben Stokes is included, though his involvement remains subject to any relevant legal or disciplinary developments in relation to the incident in Bristol in September.
Morgan top-scored with 81 not out as England chased down 258 with nearly ten overs to spare before giving his views on Hales. On this, skipper Eoin Morgan said to Telegraph, that Alex has "learnt his lesson" and knows what he did was wrong.
"We want to get the feeling around the one-day group a lot more positive and upbeat in order to play this brand of cricket".
England have endured a disastrous tour of Australia as they lost the Ashes 4-0 and have been plagued by off-field issues. That, though, is perhaps the 24-year-old Barrovian's only regret at present.
Liam Livingstone, England's uncapped selection for the Test tour of New Zealand in March and April, believes he is better placed to impress in red-ball than white-ball cricket, after missing the chance to establish his credentials in two T20 appearances against South Africa last summer.