Brazil coach Mano Menezes insists there is no chance his players will underestimate Mexico as the five-time world champions look to win a first Olympic gold in the men's final at Wembley on Saturday. While Brazil have graced the World Cup with some of the best players and most dazzling performances ever seen on football's grandest stage, the Selecao have never managed to replicate those golden moments at the Games. Brazil were bronze medallists in 2008 but this weekend's showdown with Mexico will be their first Olympic final since 1988 in Seoul, when a team led by Romario and Bebeto finished with the silver. The South Americans also won the silver in the 1984 Games in Los Angeles, but the failure to bring home a gold has rankled with such a proud football nation for decades. Brazil's Olympic angst has increased since Argentina won gold in Beijing four years ago and the prospect of taking the top prize previously held by their arch rivals, who failed to qualify for the London Games, has only increased the motivation in Menezes's squad. Brazil are unbeaten in their five matches, scoring three times in each game to take their tally to 15 goals en route to the final. The pick of the bunch have been Chelsea's new playmaker Oscar, Santos striker Neymar and Internacional forward Leandro Damiao, who struck twice in the semi-final win over South Korea. With that trio in such inspired form, Menezes has been able to give only cameo roles to top-class talents like Porto striker Hulk and AC Milan forward Alexandre Pato, while Manchester United target Lucas Moura has often failed to get off the bench. But Menezes knows the dangers of allowing his much-praised players to rest on their laurels against a Mexico side going for a first gold in their maiden Olympic final. "I expect a very difficult final," Menezes said. "Mexico have prepared well. Their under-23 side played in the Copa America and the Pan-American Games. Now they have added their three over-aged players (Jose Corona, Carlos Salcido and Oribe Peralta) they look very strong. "The players are very calm, not over-euphoric about being in the final.