Yuki Bhambri and Ramkumar Ramanathan won their respective matches to notch up straight sets victory to power India to a 2-0 lead against New Zealand on the opening day of the Asia/Oceania Group I Davis Cup tie

Vishnu Vardhan defeated Manish Sureshkumar 6-3, 6-4. Women's defending champion Prerna Bhambri defeated Mihika Yadav 6-4, 6-1.

The winners of the National Championship will get wild card entries into the 2016 Delhi Open.

During the Chennai Open, Somdev had suffered a shock first round defeat at the hands of unfancied 19-year-old compatriot Ramkumar Ramanathan, who leapt to 407th from 526th place.

Top seed Stanislas Wawrinka scored a clinical 7-5 6-2 win over French Edouard Roger-Vasselin to win his second Chennai Open title.

The world number eight, who won a title here in 2011, scored a dominating 7-5 6-2 win in the summit clash, which lasted one hour and 35 minutes.

Stanislas Wawrinka's opponent - Vasek Pospisil - conceded the match despite taking the first set 6-4, due to a sore back. Eduard Roger-Vasselin too had to fight hard for his 6-2, 3-6, 6-3 win against Spaniard Marcel Granollers.

It was the biggest win of Yuki's career when the formidable Italian, who struggled due to an injured left leg, conceded the match after trailing 1-6 5-5.

Title favourite and world number eight Stanislas Wawrinka needed just 54 minutes to brush aside the challenge of 79th Benjamin Becker rival in the rain-hit second round match.

Yuki Bhambri defeated Spain's Pablo Carreno Busta 6-4, 6-3 while Somdev Devvarman lost to Ramkumar Ramanathan 6-4, 3-6, 4-6.