Colombia striker Hugo Rodallega has warned his teammates about the threat posed by Greece's Kostas Mitroglou and Giorgos Karagounis.

Both are teammates of Rodallega at Fulham, and he is fully aware that each player can deal a blow to Colombia's hopes of reaching the knockout stages of the World Cup when they meet in the Group C opener on Saturday.

"We have to take care of Giorgos Karagounis," the 28-year-old told reporters. "He's an experienced player and he's not scared of anything. He controls the game in the middle of the park, and he's skipper of the national team.

"And, of course, they have Kostas Mitroglou, too. He is an unbelievable striker."

Karagounis was named on Fulham's released list recently, while Mitroglou's future at the club is also in doubt after their relegation to the Championship.