Kei Nishikori wins WTA tournament in Stuttgart for third year in a row . Beats Ana Ivanovic in final in 10 sets . Claims ATP sports car from sponsors . Kei Nishikori wins ATP tournament in Stuttgart .
Maria Sharapova wins WTA tournament in Stuttgart for third year in a row . Beats Ana Ivanovic in final in three sets . Claims Porsche sports car from sponsors . Kei Nishikori wins ATP tournament in Barcelona .