The Chinese won this year 's French Open , becoming the first player from an Asian nation to claim a grand slam singles title .
Player 's form has since nosedived player she was knocked out in the first round of the US Open .
The Chinese won this year 's French Open , becoming the first player from an Asian nation to claim a grand slam singles title , but her form has since nosedived and she was knocked out in the first round of the US Open .