Portugal and Nigeria won their final Group B matches to reach the last 16 of the Under-20 World Cup on Thursday, while third-place South Korea still has a chance of advancing.
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Spain and France had already advanced from Group A, and Spain won the group with a 2-1 win over the French. Captain Paco Alcacer and Jese scored before substitute Thibaut Vion found the net for France in injury time.
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The United States, which hasn't reached the knockout stages since 2007, finished last in the group after a 4-1 defeat by Ghana.
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Portugal striker Bruma scored his fourth and fifth goals of the event to help the two-time champions beat Cuba 5-0 and top the group, while Nigeria defeated South Korea 1-0 after an early goal by Olarenwaju Kayode and overtook the Asians for second place.
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Ricardo, Aladje and To Ze also found the net for Portugal, while Bruma almost added a sixth but hit the crossbar.
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It was Portugal's biggest ever win in the competition, improving on 3-0 defeats of Argentina in 1991 and the Netherlands four years later.
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Portugal won the title in 1989 and '91 and finished runner-up to Brazil two years ago. Cuba, which lost all three games and became the first team to be eliminated, was making its debut appearance.
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Nigeria secured its victory after Kayode was left unmarked by the South Korean defense and headed home a free kick by captain Abdul Ajagun in the ninth minute.
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South Korea still has a chance to advance as one of the best four third-place teams.
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Ghana had more possession in the opening half hour but the US was still able to create three scoring chances. However, a header and later a shot by Mario Rodriguez both lacked power, and a powerful 20- metre (yard) effort by Jose Villarreal brought a diving save from goalkeeper Eric Antwi.
Nigeria would definately do great in this competition. They have the necessary plaers to do the job. Good one.