Rohan Bopanna Sunday steered India to an emphatic 4-1 victory over South Korea in the Asia/Oceania Davis Cup Group I tie after winning his reverse singles match in Chandigarh. India, which had secured a world play-off berth on Saturday by taking a 3-0 lead, led 4-0 after Bopanna's triumph but South Korea managed a consolation win in the final match. Bopanna, who took court in place of Saketh Myneni, was given a hard time by Hong Chung but prevailed 3-6 6-4 6-4 on the grass court of the Chandigarh Club. South Korea's Yong-Kyu Lim then spoilt India's hopes of a clean sweep after serving past Ramkumar Ramanathan 6-3 5-7 7-6 in the fifth and final rubber. Earlier the doubles pair of Bopanna and Leander Paes had already sealed the tie on Saturday after the singles players had given India a 2-0 cushion on the opening day. It was a great tune-up for Bopanna and Paes who have been made to team up for the men's doubles draw in the upcoming Rio Olympics by the Indian tennis association.