Win or lose, Japan Under-23 coach Makoto Teguramori has warned his players not to let the outcome of Saturday's friendly against Brazil affect them ahead of their opening match at the Rio Olympics.

Japan, surprise semifinalist at the 2012 London Games, take on the hosts, who are captained by Barcelona superstar Neymar, in Goiania in its final-warm up before facing Nigeria in its first Group B match in Manaus on Aug. 4.

"If we get beaten we can't allow it to break our confidence but if we win we can't let ourselves get carried away either. We have to be very careful about this," Teguramori told a news conference on Friday.