It was the King of Clay 's first work out on Madrid 's controversial new blue clay surface but Roger Federer sweeps aside Russia 's Nikolay Davydenko 6-2 6-2 at the Stuttgart Open . Second -ranked Nadal shows no weakness on Madrid 's new blue clay . World No . 3 Victoria Azarenka battles past Milos Raonic in his opening match . Australian Open champion Li Na sets up clash with world No . 1 Milos Raonic .
Roger Federer sweeps aside Russia 's Nikolay Davydenko 6-2 6-2 at the Stuttgart Open . Second -ranked Nadal shows no weakness on Madrid 's new blue clay . World No . 3 Victoria Azarenka battles past Milos Raonic in his opening match . Australian Open champion Li Na sets up clash with world No . 1 Milos Raonic .