Cameroon head coach Rigobert Song is confident his side can stun Brazil in their final group game at the 2022 World Cup in Qatar.
Cameroon fought back from 3-1 down to grab a point and keep alive their hopes of progressing to the last 16.
One point from two games means the Central Africans will have to beat five-time champions Brazil in their final group match on Friday to have a chance of going through to next stage of the competition.
"It is possible to beat Brazil. We believe in ourselves, we did not come here to just go through the motions," Rigobert Song said after the game.
"Cameroon still has a contribution to make to this tournament."
"We reacted as well as we could [at 3-1 down] to get back into the match. We are progressing and improving."
The draw against Serbia ended an unwanted record for Cameroon of eight consecutive defeats at the World Cup, a run stretching back to the 2002 tournament in Japan and South Korea.