The quarter-final stage is always a tricky trapdoor at a FIFA finals. Four of Canada 2007's most impressive squads - Spain, Nigeria, Mexico and the US - fell at the last eight hurdle.

Some stats and figures were misleading, but the fact is Argentina and Chile are through to the last four, while Mexico and Nigeria are out.

The two meanest defences in Canada came face-to-face in Montreal on Sunday, with Chile ultimately depriving Nigeria of a semi-final berth thanks to four unanswered strikes in extra-time.

Chukwuma Akabueze's unstoppable 25-yard thunderbolt for Nigeria against Zambia proved a match-winner, and the gifted player took time out to talk to FIFA.com.

Chile could be without both Arturo Vidal and Alexis Sanchez against Nigeria as they play in the quarter-finals of a FIFA U-20 World Cup for the first time in 20 years.