Brazil face champions Argentina

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Video - Argentina progress past Holland

Brazil and reigning champions Argentina will meet in the last four of the Olympic Games - but both required extra-time to win their quarter-finals.

Lionel Messi set up one goal and scored the other as Argentina beat the Netherlands 2-1 while Brazil defeated Cameroon 2-0 in an ill-tempered game.

Rafael Sobis and Marcelo scored for the Brazilians in a game marred by 12 yellow cards and one sending-off.

Ten-man Belgium stunned Italy 3-2 to set up a semi-final against Nigeria.

The Nigerians, publicly criticised by coach Samson Siasia for ball-hogging in their last match, beat Ivory Coast 2-0 with goals from Peter Odemwingie and an 82nd-minute penalty from Victor Obinna.

Belgium found themselves trailing 1-0 and down to 10 men after 18 minutes when Thomas Vermaelen was sent off for dragging down Giuseppe Rossi, who scored from the spot.

Moussa Dembele equalised with a 24th-minute header which was deemed to have crossed the line despite Luca Cigarina's block and Kevin Miralles fired Belgian ahead in first-half injury-time.

Rossi equalised with another penalty in the 74th minute before Dembele struck the winner six minutes later as Italy uncharacteristically lost their defensive cool.

"Everybody is very important in my team but you need players who can make the difference and today Moussa Dembele made the difference," said Belgium coach Jean Francois De Sart.

Argentina went ahead with Messi's second goal of the Games but Otman Bakkal equalised before half-time.

Messi set up the winner in the first half of extra-time when he sliced open the Dutch defence and found Angel Di Maria, who side-footed home to make up for his double penalty-miss against Serbia in the group stages.

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Video - Brazil beat Cameroon