A competitor from Saudi Arabia, who is one of the country’s first female athletes ever selected for the Olympics, will not be allowed to wear a headscarf during competition, the International Judo Federation said.

President Marius Vizer ruled that “according to the principles and spirit of judo,” Wojdan Ali Seraj Abdulrahim Shahrkhani could not fight with a headscarf.

Judo officials said they were very proud their sport was one of the first to welcome a Saudi female competitor, but announced on the eve of the London Games that she would not be allowed to fight with a headscarf even though the federation has not banned women from covering their hair before.

Federation spokesman Nicolas Messner said the decision was made due to safety concerns.

Asian judo federations have previously allowed Muslim women to wear headscarves during major competitions, but Messner said the IJF had decided against it.

The ruling on Thursday could jeopardise Shahrkhani’s participation in the Olympics. Saudi leaders only agreed to send women to the Games for the first time on the condition they be allowed to wear appropriate clothing for Muslim women, including a headscarf.

The 18-year-old will compete in the over 78-category at the Olympics. She was drawn to first fight Melissa Mojica, from Puerto Rico Aug. 3.

Headscarves are allowed in taekwondo. The World Taekwondo Federation changed its rules in recent years to accommodate Muslim female athletes. Some of the strongest medal contenders at the Olympics in the female division of the sport are from Egypt and Iran.

But all taekwondo fighters must also wear a headguard which is worn over a headscarf.

International Federation of Association Football (FIFA) recently reversed it five-year ban on headscarves and now allows women to play football with their head covered.