The Indian duo of Mahesh Bhupathi and Rohan Bopanna has won its must win Men's Doubles Group-B match of the ATP World Tour Finals in London. The fifth seeded Indian pair last night defeated the Swedish-Romanian combination of Robert Lindstedt and Horia Tecau, 6-3, 5-7, 10-5, to keep its hopes of a semi-final berth alive. Bhupathi and Bopanna had lost their opening Group match and will now have to win their next and final league match to make it to the semis. They will take on the second seeded Belarusian-Canadian pair of Max Mirnyi and Daniel Nestor in the final Group match.Meanwhile, the third seeded Indo-Czech pair of Leander Paes and Radek Stepanek will clash with the Spanish duo of Marcel Granollers and Marc Lopez in their second Group-A match today. Paes and Stepanek had won their opening Group fixture and a victory today will virtually ensure them a semi-final berth.