At the other end, Guillermo Ochoa tipped a blistering Kroos free kick on to the bar minutes later, in what was to prove the Germans' closest effort of a match in Moscow in which they had more than 60 percent possession but could not make it count.
What seemed like fantasy is now possible.
But Mexico were creating by far the better opportunities and coach Juan Carlos Osorio was soon awarded for his flawless tactical plan. He pounded a fist over his heart over and over, then raised those arms a few more times.
"We need to give all the credit where it is due, and that is with the players", Osorio said.
"I think it's definitely the best goal I've ever scored in my life, we all dream of playing in the World Cup".
What followed in Moscow was a strong show of confidence by Mexico and a morale-boosting (and fully deserved) 1-0 victory, while a beaten Germany side have some big questions to answer.
A rocket in Rostov from Brazil midfield ace Philippe Coutinho might have been the individual highlight of day four in the Russian Federation 2018 World Cup.
Toni Kroos recognized that Germany, the ultimate tournament team, were now facing an unusual situation. Up front, Mexico's attack will be lead by Javier "Chicharito" Hernandez. Confident Mexican fans chanted "Ole!" after each completed pass, like they usually do against CONCACAF rivals.
Phil Mickelson shockingly chases, swats moving ball with putter
The start of that sequence was for bogey on the par-four 13th. "I would gladly take the two shots over continuing that display". It conjured up memories of John Daly hitting a moving ball that rolled off the green during the fourth round of the 1999 U.S.
"A wake-up call is too late, we now have to win two games, otherwise the World Cup is over", Hummels said.
Loew looked trendy cool in black trousers, black T-shirt and white sneakers, and Osorio resembled an academic in a white dress shirt with sleeves rolled up. Following the defeat, Kimmich didn't hold back and pointed out that losing the ball too often cost Germany dearly. That defeat to Germany followed a 7-0 mauling at the hands of Chile a year earlier at the Copa America Centenario.
Getting to that fifth game is a key.
Mexico will take on South Korea in its second first-round match in Rostov-On-Don at 10:00am Saturday. Perez was rooting of his native Mexico while Manuela was cheering for Germany.
"If we go on like this, I'll be anxious", he added.
Paez described the game as a welcome distraction from Mexico's upcoming July 1 presidential election.
Also in Group F, Sweden topped South Korea in their match today and Belgium is now on the pitch with Panama.
This year, it looked as though the curse was set to repeat itself yet again - assuming Germany won Group F and with Brazil penciled in as the presumptive winners of Group E, Mexico would be paired with Brazil in the knockout stage and face yet another uphill battle to advance.
Thousands gathered to view the match on a big TV screen in the central Zocalo square, and celebrated Mexico's win parading around the iconic Angel of Independence monument waving Mexico flags and wearing traditional "sombrero" hats.