The Bulls, Sharks and Stormers have reportedly all expressed interest in joining an expanded Pro16 tournament.
While there was talk of Griquas and the Pumas – who were given franchise status by SA Rugby in December 2017 – joining the European competition, this is apparently no longer an option for the Pro14 organisers, according to WalesOnline.
They are, however, keen to get two of the top South African Vodacom Super Rugby teams on board from the 2020-21 season.
The inclusion of the Cheetahs and Kings brings in around £6-million per season, with a TV deal in place with SuperSport.
Adding higher profile South African sides would be likely to bring in significantly more cash again.
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