A place in the semi-final will be the reward for the winner of Sunday's gripping clash between Colombia and Turkey - two teams with tactical nous, strong technique and nerves of steel. Going into the tournament, Brazil and Argentina were the hot favourites from South America, but ten days in, the two giants have returned home and it is left to Colombia to fly the flag for the continent. Meanwhile, Turkey arrived in Nigeria with no reputation but a lot of ambition, and their results have so far justified their coach Abdullah Ercan's pre-tournament vow of "We want to be world champions."
This is shaping up to be a tight encounter between two teams with contrasting qualities and very different paths to the quarter-finals. Colombia had to battle hard to qualify from Group C which contained the Netherlands, Iran and Gambia, before knocking out odds-on favourites Argentina after a dramatic comeback from 2-0 down. In their last two matches, Los Cafeteros have scored twice in the dying minutes, revealing the steely determination that Ramiro Viafara has instilled in his team.
Turkey, on the other hand, are used to doing things the other way round, scoring just after kick-off. In fact, in three of their four matches so far, they have found the net within just three minutes. In addition to this ability to get into the game straight away, in Muhammet Demir and Engin Bekdemir the Turks have a pairing that can stretch any defence.
As regards suspensions, the South Americans will be missing Jhojan Caicedo, while the Turks will be without Ogulcan Gokce. The winner will face either Switzerland or Italy in the semi-finals.
2 - Turkey do not qualify for the FIFA U-17 World Cup often, but when they do, they go far. Their only previous appearance was in 2005, in which they reached the semi-finals, and now in their second tournament, they have already made it to the quarters.
"We've had the same fighting spirit since the start of the tournament, so now we've got to forget about the Argentina match and focus on our next opponents. Turkey topped their group and gave a masterful performance against UAE. They are very strong opponents, and we owe them the utmost respect." Ramiro Viafara, Colombia coach
"We're aiming to go all the way, and to achieve this, we'll have to improve even more. We will try to give our opponents even less space, and create more goalscoring chances. It'll be difficult, but it's what we must do if we want to win." Abdullah Ercan, Turkey coach