Colombia spent 75 minutes searching for a way through a watertight Congo DR defence before their 1-0 breakthrough sent them back to the top of Group K and set up a showdown with Portugal for a place in the Round of 32.Colombia might have expected to walk all over DR Congo, but the Congolese showed again why they've been one of this World Cup's most surprising defensive sides.Congo DR thwarted attempt after attempt in the first half, frustrating a Colombian team that clearly felt they should be cutting right through Perhaps too much, when a hard clash resulted in a free kick for Congo DR, who had left Colombian keeper Vargas largely unchallenged throughout the match.As full-time loomed, the energy of the match shifted