Indian challenge ends in men's doubles event as Indo-Czech pair of Leander Paes and Radek Stepanek and duo of Mahesh Bhupathi and Rohan Bopanna lose their matches on Tuesday.While fourth seeds Leander Paes and Radek Stepanek were stunned by Ivan Dodig and Marcelo Melo in a gruelling weather-hit five-setter, Bhupathi and Bopanna lost in straight sets to Mikhael Elgin and Denis Istomin.