In the ongoing Chennai Open ATP tournament, India's Divij Sharan and Poorab Raja will pair with their respective foreign partners to play first round matches in men's doubles later tonight. N Sri Ram will partner with compatriot Ram Kumar Ramanathan in another men's doubles match against their rivals Scott lipsky and Rajeev Ram. Leander Paes, Rohan Bopanna and Saket Maineni have already reached the second round in men's doubles. In men's singles, Yuki Bhambri and Ram Kumar Ramanathan have also reached the second round.Meanwhile, S. Wawrinka today defeated Boris Becker in men's singles 2nd round match, 6-3, 6-1. In another 2nd round men's singles match, Roger-Vasselin defeated J.Vesely, 6-4, 6-4.