All the top order really had to do was to see off India's four key men and attack the fifth, but by the time Yuvraj Singh came on to bowl his part-time spin, Sri Lanka were already deep in the mire.If Sri Lanka are to turn this series around and add to their Test triumph, their much-vaunted batting line-up has to come out of its current trough. On Sunday, for the second game running, India's medium-pace trio of Zaheer Khan, Praveen Kumar and Munaf Patel left the batsmen searching for answers. T