Javier Hernandez hit his 50th international goal to enhance Mexico's bid for a place in the knockout rounds of the World Cup.
Hernandez scored Mexico's second goal in a 2-1 victory over South Korea at the Rostov Arena on Saturday.
El Tri are firmly on course for the last 16, having overcome Germany in their opening Group F match.
Hernandez, Mexico's record goalscorer, finished well with a near-post shot to add to a Carlos Vela penalty scored in the first half.
Mexico are one of five teams to have a perfect record after two matches at Russia 2018.
They join Uruguay and hosts Russia from Group A, Group B's France and Croatia from Group C on maximum points.
Hernandez also scored for Mexico on June 23 at the last World Cup, netting in a 3-1 defeat of Croatia.
