Known for their calm demeanour, both officials will be standing in a high-profile match at the Oval on Sunday.
Erasmus, a 53-year-old former Boland fast-medium bowler, will be standing in his 71st one-day international, having officiated during Pakistan's eight-wicket semi-final win over tournament hosts England in Cardiff on Wednesday.
Sunday's match will be the 44-year-old Kettleborough's 72nd ODI as an umpire.
Australia's Rod Tucker will be the television umpire on Sunday, with Sri Lanka's Kumar Dharmasena the reserve official.
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