Cameroon coach Paul Le Guen has hinted he will name midfielder Alex Song on the substitutes' bench for his side's World Cup opener against Japan on Monday. The Arsenal midfielder was expected to play a key part in the Indomitable Lions' bid to qualify from Group E but looks set to be employed off the bench initially.

Regular goalkeeper Carlos Kameni could also be another surprise exclusion, with Le Guen revealing he was set to select 36-year-old Hamidou Souleymanou between the posts.

Alexandre Song may not start the first match against Japan. This does not mean there is anything bad about him. He is a great player.

Paul Le Guen, Cameroon coach

"We've had three weeks of hard training and I've had a better idea of my team now," Le Guen said. "Alexandre Song may not start the first match against Japan. This does not mean there is anything bad about him. He is a great player. I try to pick the most competitive team."

Le Guen pinpointed the speed of Japan's attacking players as the key area of concern. "I have watched many videos of Japanese football over and over and I know their strongest weapon is that they have very swift attackers," he said. "We've worked very hard to deal with that and as concerns Monday's match, I'm full of confidence."