Paris, June 1 -- India's N Sriram Balaji and his Brazilian partner Marcelo Demoliner advanced to the men's doubles quarterfinals at the French Open on Monday, pulling off a stunning straight-sets upset over sixth seeds Kevin Krawietz and Tim Puetz of Germany, according to Olympics.com.

The unseeded Indo-Brazilian pair took one hour and 25 minutes to secure a 7-5, 6-4 upset over the experienced German duo, both Grand Slam champions, in their Round of 16 clash at Roland Garros.

The win also marked a landmark moment for 36-year-old Balaji, who reached his maiden Grand Slam quarterfinal.

With this victory, Balaji and Demoliner have set up a formidable quarterfinal clash against the second-seeded pairing of Finland's Harri Heliovaara and Gr...