Argentina, Brazil and Italy all secured a spot in the quarter-finals after picking up their second group wins.
Big trio all through to last eight
Argentina, Brazil and Italy all secured a spot in the quarter-finals of the Olympic Games after picking up their second group wins.
Holders Argentina battled past Australia, while Brazil and Italy were both convincing winners over New Zealand and South Korea.
In Group A,
Argentina required a 78th minute goal from Ezequiel Lavezzi, who converted Angel Di Maria's cross, to see off a stubborn
Australian side.
The group's other game saw
Ivory Coast remain in contention for a quarter-final spot after a 4-2 win over
Serbia.
Sekou Cisse put the Ivorians ahead after just three minutes before Serbia levelled in the 16th minute through Milan Mrdakovic.
Ivory Coast were back in front on 24 minutes after Slobodan Rajkovic put through his own net and Chelsea's Salomon Kalou made it 3-1 on 69 minutes.
Djordje Rakic pulled a goal back for Serbia a minute from the end, only for Ivory Coast to net a fourth through Gervinho in injury-time.
Brazil sit atop Group C after a 5-0 romp over
New Zealand, with Manchester United midfielder Anderson netting after just three minutes.
Alexandre Pato scored just after the half-hour mark, Ronaldinho added a free-kick and penalty before Rafael Sobis completed the rout.
Hosts
China are struggling to qualify for the next round after having two men sent off in a 2-0 defeat to
Belgium.
Moussa Dembele put Belgium in front on eight minutes and Kevin Mirallas scored a second on 80 minutes after China duo Tan Wangsong and Zheng Zhi had been dismissed.
Italy have advanced from Group D after a 3-0 win over
South Korea, with Giuseppe Rossi setting his team on their way with a 15th minute opener.
Tommaso Rocchi scored a second on 32 minutes and Riccardo Montolivo rounded off the scoring with a third in injury-time.
Stephane M'Bia's 74th minute effort earned
Cameroon a 1-0 win over
Honduras in the group's other fixture.
Holland are still in with a shout of going through from Group B after salvaging a late 2-2 draw against the
United States.
Ryan Babel put the Dutch into an early advantage before the USA took control of the game through goals from Sasha Kljesten and Jozy Altidore.
But, three minutes into stoppage-time, Gerald Sibon's free-kick kept Holland's Olympic hopes alive.
Goals from Victor Obinna and Victor Anichebe helped
Nigeria to a 2-1 win over
Japan, who replied through Yohei Toyoda, in the group's second match.
