John Dauth, who has served as Australia’s ambassador to the UN for the past four years, is among those doubtful of Asia’s current field of candidates for the UNSG position:
“…we are, it’s true, great admirers for example of the Foreign Minister of Korea, who’s now an announced candidate, …although you know, I’d have to say to you in New York, I think that candidacies of Thailand and Sri Lanka are not necessarily travelling as well as perhaps they were…it remains the view of some in New York that we need a wider field of candidates.”
When asked whether the weak reception of Ban, Surakiart and Dhanapala could cost Asia its “turn” in the regional rotation, his response was unequivocal:
“Absolutely, I think that’s a real risk now…”

more resources
View of Asian candidates “Down Under” « UNSG.org
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View of Asian candidates “Down Under” « UNSG.org