AFP, ROSTOV-ON-DON: Mexico laid one foot in the World Cup's last 16 and left South Korea on the brink of elimination after goals from Javier Hernandez and Carlos Vela clinched a 2-1 victory in Rostov yesterday.

Hernandez became the first Mexican player to score 50 goals for his country, after 104 appearances, with Vela earlier opening the scoring through yet another penalty kick.

Son Heung-min's stunning long-range effort in stoppage time gave South Korea a glimmer of hope but it was too little too late.

Mexico lead Group F on six points after two games, having backed up their shock victory against Germany with another display to suggest they can go deep in this tournament.

South Korea, beaten by a Sweden penalty in their first match, had their chances but again lacked cutting edge up front.

In temperatures around 35 degrees Celsius, Mexico were rewarded for another controlled performance that combined possession in midfield with pace and penetration in attack. Hirving Lozano, the match-winner against Germany, was excellent again in particular. Before their opening goal, however, it was South Korea that created the better chances.

Only a brilliant saving tackle from Lozano denied Lee Yong tapping in at the back post before Son saw three quick-fire shots come to nothing, the first two blocked, the last skewed wide.

But Mexico's penalty in the 27th minute was clear. Jang tried to block Andres Guardado's cross but inexplicably slid with his arm outstretched above him and the ball struck the defender's hand.

Vela was made to wait by goalkeeper Jo Hyeon-woo, who played for time by swigging his water and chatting to his team-mates, but there was no mistake. Vela slid home.