In today's semi finals, third seed Marina overcame a fighting Emily Webley-Smith of Briton in three sets after dropping the opener at the Cricket Club of India's courts.
Fourth seed Tadeja had things very much in her grasp as she dispatched second seed Anastasiya Vasylyeva of Ukraine in straight sets.
There was some cheer for host country India when its number one singles player Ankita Raina, who lost in the singles quarter finals yesterday, won the doubles crown in partnership with China's Jia-Jing Lu.
Results: Singles semi finals: 3-Marina Melnikova (RUS) beat Emily Webley-Smith (GBR) 3-6 7-5 6-3; 4-Tadeja Majeric (SLO) beat 2-Anastasiya VAsylyeva (UKR) 6-2 6-3.