As the world's highest ranked tennis players in China, Li Na started practicing tennis at six year old and turned pro in 1999. She plays all the way to the four grand slam tennis. she became the Asia's first grand slam singles champion tennis player of French open women's singles champion in 2011. In 2013 Li Na was listed in the world's one hundred most influential people and on February 17, 2014, she rose to the world's second world rankings, the women's personal highest ranked Asian record. Through observation statistics and analysis, this thesis reaches the general trend of Li’s results. The trend is that her results shows some rises and falls in the year of 2009 and 2011, while in 2010 and 2013 her peak performances are more concentrated. By large Li Na is in her best at the beginning of this year especially in January and usually June is the second peak stage and October normally is the third one.
NETL
NSTL
维普
万方数据
