Tiantian Sun defeats Serena Williams at 2005 China Open in upset

At the 2005 China Open, Tiantian Sun shocked Serena Williams, winning 6-2, 7-6(7) in the second round. The match marked a significant upset as Williams, the fourth seed and defending champion, struggled with a left knee injury during the contest. Following this defeat, Williams did not compete for the rest of the year, citing ongoing injury issues. Sun's victory remains the highest-ranked win of her career, after which she achieved a career-high ranking of world number 77 and succeeded in doubles, including winning the 2008 Australian Open mixed doubles title.

• 10:00 PMYahoo Sports — She is the player who beat Serena Williams at the China Open despite being ranked outside the world’s top 120