Indian Tennis star Leander Paes and his German pair Andre Begemann stormed into doubles semi-final in Thindown ATP Challenger tournament at Biella in Italy. Indo-German pair defeated Brazilian pair of Fabricio Neis and Joao Souza 6-4, 5-7, 10-8 in a quarter-final match yesterday. Third seeded Paes-Begemann will now meet second seeded duo of American Jamesh Cerretani and Austrian Philipp Oswald for a final berth.