The France winger is suffering from a recurring back problem which could rule him out of the tournament in Brazil.
The Bayern Munich midfielder"s international teammate, Arsenal forward Olivier Giroud, told L"Equipe: “He [Ribéry] has started to become angry. He is worried and concerned about his situation.
“We must help him hold on and be patient. When I"m injured for three days, I lose it. It is on the eve of the World Cup."
The injury caused Ribéry to miss his country’s 1-1 draw with Paraguay on Sunday.
