National Champion Ashutosh Singh shocked top seed Pavol Cervenak of Slovakia in straight sets to advance to the second round of the USD 15,000 ITF tennis event in Bellary, Karnataka [ Images ], on Tuesday.

Singh pipped Cervenak, ranked 332nd on the ATP list, 6-3, 6-4 to set up a clash with compatriot Vijayant Malik, who got past Vignesh Peranamallur Chandrasekhar 6-0, 7-5.

Both Malik and Vignesh had both qualified for the main draw.

In another upset, Aditya Madkekar went down fighting 7-6 (9,) 6-7 (1), 6-3 against qualifier Shivang Mishra.

Mishra next faces another qualifier Serbian Robert Bleak, who rallied to stun eighth seed Alexy Kedriouk 4-6, 7-6 (5), 6-2.

Also advancing to the pre-quarterfinals was Sunil Kumar Sipaeya after beating Vijay Kannan 7-5, 6-7 (1), 7-5.

Curtains were drawn on Navdeep Singh's campaign as he lost to second seed Teodor-Dacian Craciun of Romania 3-6, 2-6.

Wild Card Yuki Bhambri [ Images ] also made an early exit after losing his first round tie to fifth seed Dekel Valtzer of Israel.