Hifumi Abe of Japan came out on top in the battle for gold in the men's under 66kg judo ©Getty Images

Brittany Dutton of Australia won the first gold medal of Nanjing 2014 in the women's triathlon ©Getty Images

Australia beat Tunisia 31-0 as rugby sevens made its Olympic debut on the opening day of the Summer Youth Olympic Games ©Getty Images

Jiang Huihua won China's first gold of Nanjing 2014 with victory in the women's 48kg weightlifting ©AFP/Getty Images

Under starter's orders for the men's 100m breaststroke semi-final ©Getty Images

Sabrina Massialas (left) of the United States won gold in the women's foil individual ©Getty Images

Nicole Trosman of Israel won her opening table tennis match against Australia's Vy Bui ©IOC
Shen Duo of China helped her team to gold in the  mixed 4x100m freestyle relay ©Getty Images

Sione Masoe of the United States could not stop Kenya winning their rugby sevens match 22-12 ©Getty Images

Krystsina Staraselets of Belarus won her women's single sculls heat ©IOC