Ivana Babic(R) of Croatia competes with Fatma Saridogan of Turkey during the Women -55kg Gold Medal Final of taekwondo at the Nanjing 2014 Youth Olympic Games in Nanjing, capital of east China's Jiangsu Province, on August 19, 2014. Ivana Babic won the gold medal. (Xinhua/Chen Cheng)

Ivana Babic(L) of Croatia and Fatma Saridogan of Turkey, pose after the Women -55kg Gold Medal Final of taekwondo at the Nanjing 2014 Youth Olympic Games in Nanjing, capital of east China's Jiangsu Province, on August 19, 2014. Ivana Babic won the gold medal. (Xinhua/Chen Cheng)

Ivana Babic(R) of Croatia celebrates after the Women -55kg Gold Medal Final of taekwondo against Fatma Saridogan of Turkeyat the Nanjing 2014 Youth Olympic Games in Nanjing, capital of east China's Jiangsu Province, on August 19, 2014. Ivana Babic won the gold medal. (Xinhua/Chen Cheng)

Ivana Babic(L) of Croatia competes with Fatma Saridogan of Turkey during the Women -55kg Gold Medal Final of taekwondo at the Nanjing 2014 Youth Olympic Games in Nanjing, capital of east China's Jiangsu Province, on August 19, 2014. Ivana Babic won the gold medal. (Xinhua/Chen Cheng)

Gold medalist Edival Marques Quirino Pontes of Brazil celebrates after Men-63kg final of Taekwondo event of Nanjing 2014 Youth Olympic Games in Nanjing, capital of east China’s Jiangsu Province, on Aug. 19, 2014. (Xinhua/Chen Cheng)

Gold medalist Edival Marques Quirino Pontes of Brazil fights against silver medalist Jose Ruben Nava Rodriguez of Mexico Men-63kg final of Taekwondo event of Nanjing 2014 Youth Olympic Games in Nanjing, capital of east China’s Jiangsu Province, on Aug. 19, 2014. (Xinhua/Chen Cheng)

Gold medalist Edival Marques Quirino Pontes of Brazil(L) fights against silver medalist Jose Ruben Nava Rodriguez of Mexico Men-63kg final of Taekwondo event of Nanjing 2014 Youth Olympic Games in Nanjing, capital of east China’s Jiangsu Province, on Aug. 19, 2014. (Xinhua/Chen Cheng)

Gold medalist Edival Marques Quirino Pontes of Brazil(R) fights against silver medalist Jose Ruben Nava Rodriguez of Mexico Men-63kg final of Taekwondo event of Nanjing 2014 Youth Olympic Games in Nanjing, capital of east China’s Jiangsu Province, on Aug. 19, 2014. (Xinhua/Chen Cheng)

Gold medalist Edival Marques Quirino Pontes of Brazil(2nd L),silver medalist Jose Ruben Nava Rodriguez of Mexico(1st, L), bronze medalist Christian Mcneish of Great Britain(1st, R), Nabil Ennadiri of Netherlands pose on the podium during the awarding ceremony for the Men-63kg final of Taekwondo event of Nanjing 2014 Youth Olympic Games in Nanjing, capital of east China’s Jiangsu Province, on Aug. 19, 2014. (Xinhua/Chen Cheng)

Ivana Babic(R) of Croatia competes with Fatma Saridogan of Turkey during the Women -55kg Gold Medal Final of taekwondo at the Nanjing 2014 Youth Olympic Games in Nanjing, capital of east China's Jiangsu Province, on August 19, 2014. Ivana Babic won the gold medal. (Xinhua/Chen Cheng)

Gold medalist Ivana Babic(2nd, L) of Croatia, silver medalist Fatma Saridogan(1st, L) of Turkey, bronze medalist Laura Roebben(1st, R) of Belgium and Tatiana Kudashova of Russian Fed pose after the Women -55kg Gold Medal Final of taekwondo at the Nanjing 2014 Youth Olympic Games in Nanjing, capital of east China's Jiangsu Province, on August 19, 2014. (Xinhua/Chen Cheng)