In Tennis, top pair of Sania Mirza and Martina Hingis will be facing Hungarian-French pair of Timea Babos and Kristina Mladenovic in the third and final round robin match of WTA finals, tomorrow.The duo defeated Czech pair of Andrea Hlavackova and Lucie Hradecka in the Red Group.In the singles category, Polish Agnieszka Radwanska beat Simona Halep 7-6, 6-1 in their last round robin match today.This resulted in Maria Sharapova's entry into the semi-finals. But despite Radwanska's 500th career victory, she now faces an anxious wait as she needs the Russian to beat Italy's Flavia Pennetta in straight sets later if she is to enter the semi-finals.Spain's Garbine Muguruza is on top of White Group, which also includes Germany's Angelique Kerber and Czech players Petra Kvitova and Lucie Safarova.Final standings in the group are to be determined tomorrow.The WTA finals is an annual event participated by the top 8 players or pairs of the year who are divided into two round robin groups, known as the red and white.Top two from each group progress to the semi-finals, followed by the finals.