India's Somdev Devvarman registered a stunning victory over World Number 45 Janko Tipsarevic in the second round of the Davis Cup World Group tie, as India squared 1-all against top-seed and defending champions Serbia on Friday. Devvarman won 7-6, 7-5, 7-5 in the second singles match played at the Spens Sports Center in Novi Sad, Serbia.