Patosi has had an excellent campaign in Belgium this season, scoring six goals in 20 starts for his Jupiler League club Lokeren this season, including a wonder-strike that became an internet sensation across the world.
Ajax again sent a scout to view Patosi in the 2-2 home draw with Gent on Saturday, one of a number of times they have had him watched this campaign.
Should they extend their interest to making an offer, it would only be for the start of next season with Lokeren unwilling to sell in January.
Chelsea are said to be keeping tabs on him too, though their interest does not look as strong as that of Ajax at this stage.
Patosi is looked after by his Barcelona-based business manager Rob Moore, who has good relations with the Amsterdam club. They have nursed Steven Pienaar and Benni McCarthy through the club.
Should he join Ajax he would be the ninth South African to sign for the club after Pienaar, McCarthy, Aaron Mokoena, Gabriel Mofokeng, Hans Vonk, Daylon Claasen, Stanton Lewis and Thulani Serero.
Any move for Patosi would be costly, with the 20-year-old having recently signed a new contract that could keep him at Lokeren until 2016.
Patosi received his first call-up to the Bafana Bafana squad for the international against Malawi on December 22, but Lokeren have refused to allow him to travel as they have a key league match against Darren Keet’s Kortrijk the day before.
He has been given permission to go to the post-Christmas camp with a scheduled arrival on December 28, just two days before Igesund names his final 2013 Africa Cup of Nations selection on December 30.