The woman who knocked out world tennis number one Serena Williams has been brushed aside in the quarter-finals of the Stuttgart Grand Prix.
China's Li Na has been sent packing 6-2, 6-3 in 66 minutes by Russia's Nadia Petrova.
In the semi-finals Petrova will face Victoria Azarenka of Belarus who has defeated Olympic champion Elena Dementieva 7-6 3-6 6-1.
