India's Vaishnavi Adkar faltered under the weight of unforced errors, slumping to a shock straight-set defeat against Aunchisa Chanta as the hosts trailed 0-1 against Thailand in their opening Asia/Oceania Group I tie of the Billie Jean King Cup here on Tuesday.

Ranked 73 places above her opponent at 383, Vaishnavi went down 1-6, 3-6 in one hour and 13 minutes at the DLTA Centre Court after play was delayed by more than three hours due to persistent drizzle which caused unusually cool conditions.