Franck Ribéry could miss the World CupRibéry has scored 16 goals for the national team
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.