Riding on a brace each from Surkumar Singh and Edeh Chidi, Mohun Bagan demolished ONGC 5-1 in their opening quarter final league match of the 122nd Durand Cup football tournament here Wednesday.

Fresh from their IFA Shield final loss to Churchill Brothers, Mohun Bagan put on a clinical performance to stake claim to their 17th Durand Cup title at the Ambedkar Stadium.