With five Olympic medals, Ni Xiong trails only Dmitry Sautin among Olympic divers. In 1988, Ni won his first Olympic medal, a silver behind Greg Louganis on the platform. In 1992, Ni finished third in the Olympic platform event. Turning his emphasis to the springboard, he won the gold medal in 1996 and 2000 and in 2000, added a gold medal in the new event of synchronized springboard diving, partnered by Xiao Hailiang. In 2000, Ni and Xiao also won the World Cup and the Grand Prix Super Final in synchronized springboard.