Foster's participation in January’s African Cup of Nations finals is now in doubt, even if South Africa coach Hugo Broos said on Friday he hoped to see the forward back in action soon.

"I made contact with the Burnley coach (Vincent Kompany), who I know very well, and also the medical staff," Broos said.

"Lyle for the moment has a serious medical problem. The team asked us not to give further comment on that out of respect to his family.

"I hope he will be recovered as soon as possible because he can be a very important player for us," the Belgian-born coach added.

Burnley announced on Thursday Foster would be sidelined indefinitely.

Foster has scored three goals for struggling Burnley this season in eight appearances.

"We ask for your understanding and respect Lyle's privacy around this matter and will not be making any more comment until further notice," the English club said in a statement.

South Africa host Benin in Durban on November 18th in their opening qualifying match for the 2026 finals, followed by a second Group C clash in Rwanda on November 21st.

South Africa will compete at the Cup of Nations in the Ivory Coast in January, drawn in Group E with Mali, Namibia and Tunisia.