Julian Quinones's early strike set the tone for a dominant Mexican display in the Group A encounter with Raul Jimenez's header midway through the second half removing any lingering tension for the home crowd.

Yet the match will be remembered as much for the three dismissals, with South Africa having Sphephelo Sithole sent off early in the second half, with his teammate Themba Zwane following him off the pitch before Mexico's Cesar Montes was dismissed in the dying moments.

The ill-tempered encounter spoiled an otherwise party atmosphere, yet the home crowd got to celebrate an opening victory that will set the nation up nicely to make it out of a group that also includes South Korea and  Czech Republic.

The game was barely minutes old when Jimenez stung the fingertips of South Africa goalkeeper Ronwen Williams with a volley from 12 yards, but the tournament's opening goal was not long in coming.

Sithole was robbed on the edge of his own box by Erik Lira, preferred in the heart of midfield to captain Edson Alvarez, and he quickly fed Quinones who danced inside before drilling a low finish beneath Williams.

It took 35 minutes for South Africa to even vaguely threaten the Mexico goal when Lyle Foster glanced a header wide, yet as the first half drew to a close Hugo Broos's side was clinging on for dear life.

First Jimenez wafted a foot at an in-swinging cross to draw a fine save from Williams before Quinones struck the post from close range with the goal at his mercy and Brian Gutierrez pushed an effort wide when he should have done better.

The second half began in a similar vein and it was Gutierrez who drew the first red card when his marauding run towards the box was stopped in its tracks by Sithole, whose clumsy tackle from behind earned him his marching orders to complete a miserable afternoon's work for the midfielder.

The crowd had begun to get a little restless at Mexico's failure to turn their numerical advantage into another goal but that frustration was relieved when Jimenez bagged his first World Cup goal, with a powerful downward header past Williams from a devilish cross by Roberto Alvarado.

The game's finale was dominated by the dismissals with Zwane sent off after a VAR check for a supposed arm to the face while Montes was sent off for Mexico for denying a goalscoring opportunity.