Mexico turned on the style at their iconic Azteca Stadium on Tuesday, brushing Ecuador aside 2-0 to break their World Cup knockout curse dating back 40 years.
The round-of-32 match was delayed for an hour due to stormy weather and when it started the co-hosts flew out of the blocks, mounting wave after wave of attacks.
In a supercharged atmosphere, Julian Quinones gave Mexico a deserved lead midway through the first half with a thunderous strike and then turned provider for Raul Jimenez.
Ecuador desperately needed to wrest back the momentum after the break but struggled to shift through the gears, with the home side largely in control.
Mexico had not won a World Cup knockout game since 1986, when they last hosted the tournament.
Tuesday's win means they are now unbeaten in 10 World Cup games at the Azteca and will fancy their chances against England or the Democratic Republic of Congo in the round of 16.
Mexico were one of only three teams in the group phase to win all three of their matches, alongside France and Argentina, and did not concede a single goal.
Ecuador finished third in their group, scoring just two goals.
Gilberto Mora, 17, was named in the starting line-up for Mexico, becoming the second-youngest player to start a knockout match at the World Cup finals behind Pele in 1958.
The home team started on the front foot, refusing to allow a shell-shocked Ecuador to settle.
Jimenez wasted a glorious headed chance in the seventh minute and Mora flashed just wide.
At the other end, John Yeboah muscled his way into the penalty area in a rare foray forward for the visitors, clipping the outside of the near post.
Mexico took the lead in the 22nd minute when Saudi-based Quinones received the ball from Roberto Alvarado and tore down the left before driving into the box and unleashing an unstoppable shot past goalkeeper Hernan Galindez, raising the roof.
The first hydration break failed to change the script and Mexico doubled their lead after half an hour when Quinones fed Fulham striker Jimenez, who fired a rocket into the top corner.
Raul Rangel produced a fine save to keep out another Yeboah effort as Ecuador got a foothold in the match but chances kept flowing at the other end.
Ecuador coach Sebastian Beccacece made a number of changes after the break in an effort to find a way back into the match.
But Mexico, largely content to sit back, still looked the more threatening team, with Cesar Montes twice going close.
Ecuador substitute Kevin Rodriguez poked just wide with just over a quarter of an hour but their chances ran out.
Piero Hincapie was sent off in stoppage time after covering his mouth during a confrontation with an opposition player to cap a miserable night for Ecuador.
Mexico will hope the Azteca, which hosted the World Cup final in 1970 and 1986, works its magic again in the last 16 on Sunday.
From the quarterfinals onwards, all the matches at the World Cup will be taking place in the United States.
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