The 28-year-old is one of only two over-age players in the Under-23 squad looking to capture Brazil's first ever Olympic gold medal in Beijing.

Despite handing the AC Milan new-boy the captain's armband, Dunga admitted he was not sure where to play him when the Brazilians kick off their Olympic campaign against Belgium in Shenyang on August 7.

"We have not yet decided whether to use him as a striker or a midfielder. We will field him in his best position - the one in which he is most comfortable," said Dunga.

"That's why we are playing all these friendly matches and training, so that he can play for the team and find out where he is most comfortable."

Dunga hopes to use Monday's match in Singapore and a friendly against Vietnam in Hanoi on Friday to test out the formations and tactics that his side will utilise at the Olympics.

"We are still training and trying to develop our tactics. We will decide on the formation and tactics depending on how the players are performing and the opponents we are playing against.

"At times, the players may be required to play out of position for tactical reasons but that's why we train and play friendlies."

Despite winning a record five World Cups, Brazil have failed to shine at the Olympics, where their best showings were silver medals at the 1984 and 1988 Games.

Dunga admitted that winning Olympic gold may be a tougher task because of his team's lack of preparation time.

"To win an Olympic medal is a bit harder because we don't have much time to prepare," he added.

"With respect to the World Cup, we have four years to prepare but for the Olympics, we normally have about 15 days and players are coming back from their holidays and from other competitions and need time to recover.

"But there is motivation for us to do well this time.

"There is a lot of pressure but the players are coping well.

"Although most of them are young, they have already been playing for big clubs in Europe and Brazil."