SHENYANG - Italy suffered a stunning 3-2 quarterfinal defeat against 10-man Belgium in Olympic soccer on Saturday while Brazil and titleholders Argentina both won in extra-time to set up a semifinal meeting.
Lionel Messi set up one goal and scored the other in Argentina's 2-1 win over the Netherlands and Brazil beat Cameroon 2-0 to avenge their traumatic quarterfinal defeat against the Africans in Sydney eight years ago.
Belgium, who will face Nigeria in the semifinals, 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 in the 80th minute as Italy uncharacteristically lost their defensive cool.
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.
Brazil and Cameroon produced one of the tournament's low points as they shared 12 yellow cards and 56 fouls in a cynical game which also saw Cameroon's Albert Baning dismissed in the 52nd minute for a second bookable offence.
Rafael Sobis and Marcelo scored in a four-minute spell in extra-time to keep Brazil - jeered by the crowd - on course for a first Olympic gold.
The match was watched by Fifa president Sepp Blatter.
Nigeria, publicly criticised by coach Samson Siasia for ball-hogging in their last match, beat Ivory Coast 2-0. Peter Odemwingie swept home Victor Obinna's pass in the 44th minute and Obinna converted an 82nd minute penalty. - Reuters
l World record holder Kenenisa Bekele of Ethiopia secured what he hopes will be the first leg of the long-distance double when he retained his Olympic 10 000 metres title with a devastating last lap yesterday.
Bekele has said he hopes to race the 5 000 metres but will decide later. - Reuters