Mexico will not be over-confident when they play South Korea in their Group F game at the World Cup on Saturday, aware that their opponents may adopt any of a number of formations to outsmart the team.
Edson Alvarez was brought in as centre back for Mexico's World Cup Group F game against South Korea in the only change made by coach Jose Luis Osorio after the Latin Americans defeated defending champions Germany.
The 20-year-old Alvarez, one of Mexico's hottest prospects, replaces Hugo Ayala.
Mexico will qualify for the last 16 if they win and Germany fail to beat Sweden.