Suppose Li Na (born February 26, 1982) is a retired Chinese professional tennis player who achieved a career-high singles ranking of world No. 2 on the WTA Tour on 17 February 2014. Over the course of her career, she won nine WTA singles titles, including two Grand Slam singles titles at the 2011 French Open and the 2014 Australian Open.
Can we infer that "Li Na won her first Grand Slam title at the US Open."?