(CNN) -- Italy have reached the quarterfinals of the under-20 World Cup after defeating 10-man Spain 3-1 in their last 16 match in Cairo -- FIFA's official Web site has reported.
Mattia Mustacchio (right) celebrates his opening goal in Italy's 3-1 victory over Spain in Cairo.
The score was still goalless when Spain defender Alberto Botio was shown a straight red card for a 28th-minute lunge on Mattia Mustacchio.
Despite their handicap, Spain held on until the 55th minute when Mustacchio prodded Italy ahead after being put through by Andrea Mazzarani -- the first goal Spain had conceded in the tournament.
Mazzarani went from provider to scorer six minutes later when taking advantage of an error from Oriel Romeu to burst through and poke the ball past goalkeeper Sergio Asenjo.
Spain were thrown a 66th-minute lifeline when Michelangelo Albertazzi tugged back Andre Herreira in the penalty area and Aaron Niguez cheekily converted the spot-kick.
And Spain then wasted a golden opportunity to draw level when awarded a second penalty after Niguez was fouled by substitute Matteo Bruscagin with six minutes remaining.
However, goalkeeper Vincenzo Fiorillo guessed right to keep out Niguez's spot- kick -- and Italy secured their place in the next round when Mustacchio raced clear to fire home in the 87th minute.
Meanwhile, in the evening's other match, South Korea cruised into the last eight with a comfortable 3-0 victory over Paraguay thanks to two goals from Kim Min-woo and another from Kim Bo-kyung.