For Tech Mahindra, the successful bidder for Satyam Computer Services, it was "a game-changing day", according to Anand Mahindra, vice-chairman & MD of Mahindra & Mahindra. And the start of a process full of challenge. Anand Mahindra, also chairman of Tech Mahindra, and Vineet Nayyar, vice-chairman and CEO of Tech Mahindra, address some of these concerns at a press conference. Edited excerpts: