In the Singles semi-finals of the ATP Chennai Open Tennis tournament today, top seeded Swiss Stanislas Wawrinka will take on Canada's Vasek Pospisil, while Spaniard Marcel Granollers will face Frenchman Edouard Roger-Vasselin.In the Doubles second semi-final, the German duo of Martin Emmrich and Andre Begemann will clash with the Croatian pair of Marin Draganja and Mate Pavic. The Swedish-Danish combination of Johan Brunstrom and Frederik Nielsen stormed into the finals on Friday, beating the Indo-Russian team of Saketh Myneni and Karen Khachanov, 6-4, 6-3, and ending India's campaign in the Doubles.Earlier, the Indian challenge in the Singles also came to an end, after Frenchman Pospisil defeated Yuki Bhambri, 6-3, 6-3 in the quarterfinals.