Former Yugoslav international Dragan Stojkovic has called upon Japan to learn from the ‘slap in the face' handed out by Serbia on Wednesday.
Japan were defeated 3-0 in Osaka by a third-string Serbia team and the players left the pitch at the Nagai Stadium to a chorus of boos from the fans.
Both teams are preparing for the 2010 World Cup but Japan, who will face the Netherlands, Cameroon and Denmark in June, seemingly have much work to do.
Stojkovic, who is coach of J-league team Nagoya Grampus, was disappointed with what he saw.
"They have an obligation to play for the spectators and especially two months before the World Cup they have to be more motivated,” the former Red Star Belgrade captain said according to Kyodo News.
“I am very disappointed. I didn't see the movement. This is very dangerous.
"Japan is always a kind team and they play kindly football and everybody knows they are not aggressive. It is very easy to criticize after the game but two months before the World Cup people are concerned.
"Big red warning signs are flashing and hopefully this slap in the face will wake them up. If it doesn't, then they need another slap in the face.
"With this kind of attitude they have no chance (at the World Cup). It will be very, very difficult. I cannot understand the attitude of the players."