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.
On former ace Stephan Edberg coaching players, Youzhny, a great fan of Edberg, recalled his stint as one of the ball boys during a Davis Cup final.
Left-handed Jeevan lost 5-7 2-6 to another left-hander and world number 85 Jiri Vesely of Cezch Republic in the first singles main draw match of the tournament at the centre court.
At a media interaction here Monday even as the Chennai Open commenced, World No.8 Wawrinka pointed out that it being the first tournament of the season, the opening match was crucial to get back into groove after the off-season.
India have three players in the singles main draw, which has world number eight and 2011 champion Stanislas Wawrinka as the top seed apart from 2008 champion and Russian second seed Mikhail Youzhny.
Wawrinka emerged from the shadows of legendary compatriot Roger Federer with a string of major semi-final appearances that lifted him into the top 10 after starting 2013 ranked 17th.
Ramkumar got past against compatriot and wild card Sumit Nagal 6-2 6-0 while Sanam toyed with another wild card Ajai Selvaraj 6-0 6-0.
Last year Somdev Devvarman had entered the main draw as a wild card. He won his first round against Jan Hajek (Cze) but lost to top seed Tomas Berdych. Yuki was ousted in the first round by Robin Haase of the Netherlands.
The 28-year-old, who is visiting Chennai for the sixth consecutive year to vie for the crown at the 19th edition of the Chennai Open, wants to make another "strong appearance" here.