South Africa finished their one-day series against Sri Lanka with a clear idea of both the team and the tactics they will use in the upcoming Cricket World Cup.
Sri Lanka, after their fourth 5-0 series defeat in less than two years, appeared to be in disarray.
South African captain Faf du Plessis said after the fifth match on Saturday night that he was "98 to 99 percent" sure who would go to England.
He said the "one or two percent" was to allow for "guys who are really red hot or striking good form".
Sri Lankan captain Lasith Malinga said form in a forthcoming domestic tournament would be important, while he expected experienced players like Angelo Mathews and Dinesh Chandimal - who did not play in South Africa - to be in contention.
Du Plessis indicated that South Africa were pinning their hopes on a potent bowling line-up to win matches, even if meant that the team might have a lengthy tail.
South Africa's fast bowlers, backed by leg-spinner Imran Tahir, dominated the Sri Lankan batsmen, who were unable to bat out a full 50 overs in any of the matches.
Du Plessis cited the example of Pakistan, who won the 2017 Champions Trophy in England.