HOCKENHEIM, Germany - Fifa, the governing body of world football, "wants to ban" the special helmet that German driver Nico Rosberg hoped to wear for the 2014 German GP.Germany triumphed over Argentina on July 13 to secure its fourth soccer World Cup title. Mercedes' Rosberg announced he would wear a "special-edition helmet" at his home race at Hockenheim on July 20.Rosberg revealed the helmet on Mercedes-Benz' official Twitter account. The helmet sports German soccer World Cup details and an image of the trophy.'UNDERMINES FIFA'S INTEGRITYRosberg tweeted: "This will be my Hockenheim World Cup special helmet with the Fifa trophy. How do you like it?" According to German daily Bild-Zeitung, Fifa "wants to ban" Rosberg from wearing it. Indeed, in its public guidelines, Fifa warns that it vigorously protects the "official marks" of the World Cup, including the image of the famous gold trophy.According to Fifa: "Any unauthorised use of the official marks not only undermines the integrity of the Fifa World Cup and its marketing programme but also puts the interests of the worldwide football community at stake."