Goals from Yerry Mina, Radamel Falcao and Juan Cuadrado gave Colombia a convincing 3-0 win on Sunday against Poland, who were eliminated from contention at the World Cup before their last Group H match.
Japan and Senegal, who both picked up wins in their first games, drew 2-2 earlier on Sunday and are in a battle with Colombia to qualify for the knockout stage.
Mina headed home from close range in the 40th minute when midfielder Juan Fernando Quintero caught the Poland defence off guard from a short corner with a smart clipped pass to James Rodriguez who whipped it in first time with his left foot.
Quintero's defence-splitting pass then gave captain Falcao, who missed the 2014 tournament due to injury, his first World Cup goal in the 70th, while Rodriguez got his second assist five minutes later when he set up Cuadrado to make it 3-0.