In the ISL match played at Kolkata Friday, Dudu Omagbemi and Konstantinos Katsouranis struck either side of the break as FC Pune City capped an outstanding 3-1 away win against Atletico de Kolkata to snap the league leaders unbeaten run in the tournament. Despite the loss ATK remain on top with 12 points. The Pune franchise, who travelled without their French World Cup winner David Trezeguet, stunned one and all as their East Bengal recruit Dudu superbly directed a header in the 31st minute. Till then, ATK had the better share of possession against Pune's defence that looked weak. But the day clearly did not belong to the league leaders who had two howlers early on with their top two striking duo– Fikru and Borja Fernandez — missing one each. Their difficulties were doubled when Kostas Katsouranis struck, making it 2-0. ATK finally made their presence in the score sheet in the 84th minute after Pune goalkeeper Arindam Bhattacharya felled Fikru in an inexplicable manner as the Ethiopian converted from the spot without much fuss. Pune got a free-kick at the edge and Davide Colomba converted the shot with a left footer, sinking ATK's fortunes.