India have defeated South Korea 4-1 in the Davis Cup AsiaOceania Group I tie in Chandigarh on Sunday.Playing his first Davis Cup singles match in four years, Rohan Bopanna edged past Hong Chung in a tough match. Asked to take court in place of Saketh Myneni, who is still recovering from his gruelling match on Friday, Bopanna laboured to a 3-6, 6-4, 6-4 win against Chung.Ramkumar, however, lost the close contest 3-6, 6-4, 6-7.India will now make its third attempt to qualify for the elite 16-nation World Group. India last played in World Group in 2011 when it lost the first round against Serbia.After that, they have lost play-offs twice – against Serbia (in 2014, Bangalore) and Czech Republic (in 2015, New Delhi).