The Mexicans put up a solid fight against the hosts on Tuesday to earn a valuable point in their quest to reach the second round.
Despite increasing their chances of getting out of Group A ahead of their final game with Croatia, Herrera has urged his side to remain cautious.
"We picked up a point but we've not achieved anything solid just yet," he told FIFA.com. "We're in the group and battling it out for a place (in the next round), even with Brazil.
"We've still got another group game to play and, like always, we'll be going all out for the win. We're ready to compete with anybody. There's a still a lot to do."
Mexico play their final game in Group A on Monday when they meet the Croatians in Recife.