Juan Carlos Osorio's men were handed a tough draw in Russia, including taking on the defending world champions, who won all 10 of their qualifiers.
Sanchez, who made 99 appearances for Mexico, said the team know they have a challenge on their hands, but if they play their game, they could push Germany.
"There's no question that Germany is much bigger and taller than the Mexican squad, but this is not basketball, it's soccer, so the way to challenge them is to move quickly and play the ball really well," Sanchez told Omnisport in association with Powerade, the official sports drink of the World Cup and the Mexican team.
"Focus on speed, speed is what kills [strength] and height, so Mexico will have that going for them."
The match against Sweden, who will be playing without Zlatan Ibrahimovic, is set to be a challenge even though they have not won an opening game at the World Cup since 1958. That win, ironically, came against Mexico in 1958.
"They're a very interesting team to watch," Sanchez said before pointing to Sweden's ability to make the most of their talents.
"They're incredibly disciplined," he continued. "They thrive on their ability to fit all the pieces of the puzzle really, really well."