N Sriram Balaji and his Mexican partner Miguel Angel Reyes-Varela registered a straight-sets victory over Robin Haase and Aleksandr Nedovyesov.
Somdev Devvarman failed to cross the first round hurdle at the second Grand Slam of the season as he waged a tough fight before losing to Aleksandr Nedovyesov in the French Open.
World number one Novak Djokovic shook off an eye infection to beat Kazakhstan's Aleksandr Nedovyesov 6-1 6-2 6-3 in front of a passionate home crowd to give Serbia a 1-0 lead against Kazakhstan in their Davis Cup first-round tie on Friday. Djokovic, who was forced to retire with the problem from last week's Dubai Championships quarter-final against Spaniard Feliciano Lopez, showed no sign of problems as he brushed aside his opponent in the acoustic Pionir Arena. The 28-year-old from Belgrade delighted the home fans, who enjoyed a rare opportunity to watch him live because there are no major tour events in Serbia, with a barrage of sizzling winners, including some spectacular net points.
Serbia had their backs to the wall when Kazakh veteran Mikhail Kukushkin beat debutant Miomir Kecmanovic in a three-hour epic in the first singles rubber. But Djokovic calmly levelled the tie with a straight-sets defeat of Alexander Bublik before returning to court to team up with Nikola Cacic and beat Kazakh pair Andrey Golubev and Aleksandr Nedovyesov 6-2, 2-6, 6-3.
Germany's Jan-Lennard Struff and Tim Puetz pulled off a shock 6-3, 6-4, 3-6, 6-7(4), 7-5 win over Spain's Feliciano Lopez and Marc Lopez to give Germany a 2-1 lead in their Davis Cup quarter-final on Saturday.
Ageing tour warrior Lleyton Hewitt ushered Australia into the Davis Cup semi-finals on Sunday, trouncing Aleksandr Nedovyesov 7-6(2), 6-2, 6-3 in the decisive singles rubber against Kazakhstan.
Nagal will meet compatriot Saketh Myneni, who also qualified for the quarter-finals.
Favourites Russia Tennis Federation opened their Davis Cup Finals campaign with a resounding victory over Ecuador, Britain began with a win against France and Italy eased into the quarter-finals with a win over Colombia on Saturday.
champion Lleyton Hewitt and Sam Groth combined to defeat Kazakhstan in their Davis Cup doubles tie on Saturday and keep Australia's semi-final hopes alive.
A round-up of results from Davis Cup matches played on and Sunday
India youngster Saketh Myneni clinched his maiden ATP Challenger level singles title after getting the better of Aleksandr Nedovyesov of Kazakhstan in a hard-fought three-set match at the Indore Open on Sunday.
India's top singles star lifted his third ATP Challenge title as he outclassed top seed Aleksandr Nedovyesov 6-3, 6-1 in the final of the $ 100,000 ONGC-GAIL Open in New Delhi on Sunday.
Yuki Bhambri advanced to the singles second round of the ATP Tashkent Open and reached the doubles quarter-finals, partnering compatriot Divij Sharan, following an upset victory over the top seeds on Tuesday.
Indian challenge ended at the Hong Kong Open World Tour Super 500 tournament after Kidambi Srikanth and Sameer Verma lost their respective men's singles quarterfinal matches on Friday.
Shooters continued to deliver medals for India at the 17th Asian Games with the trio of Heena Siddhu, Rahi Sarnobat and Anisa Sayyed cliching a bronze in the women's 25m pistol event in Incheon on Monday.
Former World No 1 Ana Ivanovic was upset 7-5, 6-4 by 42nd-ranked Karolina Pliskova of the Czech Republic in the second round of the US Open on Thursday.
Leonardo Mayer beat Joao Souza in a Davis Cup singles match that lasted a record six hours and 42 minutes.
A round-up of results from Davis Cup matches played on Saturday and Sunday
Top 10 seeds David Ferrer, Tomas Berdych, Stan Wawrinka and Richard Gasquet raced into the second round of the Australian Open on Monday, apparently eager to make the most of relatively mild conditions at Melbourne Park.
Roger Federer glided to victory on another hot, steamy day at the US Open, the envy of a clutch of men's players made to work overtime on Tuesday at the season's final Grand Slam.