In 2009, Ding Ning defeated Zhang Yining, who was ranked second in both stages, in the internal trial of crossing Yokohama in Guo Ping, and became the champion of "crossing Yokohama". He was the first to qualify for the World Table Tennis Championships, started his first singles tour, won the first world championship in his career and became one of the main players.
On 20 10, Ding Ning and Guo Yan participated in the team competition of the World Table Tennis Championships on behalf of the China national team, but lost to Feng Tianwei and Wang Yuegu of the Singaporean team in the final, and finally only won the runner-up. In June165438+1October of the same year, Ding Ning represented China in the Guangzhou Asian Games, and participated in the women's team, women's doubles (with Liu) and mixed doubles (with ZhangJike) in table tennis competitions. The women's team and women's doubles each won a gold and a silver.