Kolkata: A revamped East Bengal, inspired by Greek striker and substitute Dimitrios Diamantakos double strike, stunned archrivals Mohun Bagan 2-1 in a fiery Kolkata Derby to storm into the semifinals of the 134th IndianOil Durand Cup here on Sunday. Diamantakos, brought on as an 18th-minute substitute after Moroccan forward Hamid Ahadad limped off injured, turned out to be the gamechanger. The 32-year-old first converted from the penalty spot in the 38th minute before doubling East Bengal