Germany coach Joachim Loew had taken a "B" side to the tournament, which was considered a dress rehearsal for the World Cup, and that show in Sochi was a validation of the world champions' strength in depth.
There were warning signs for the world champions before defeat in Moscow - the 2-1 win friendly win over Saudi Arabia is now Germany's only win in their past seven games.
Exultant supporters who seemed to outnumber Germans in the crowd of 78,011 sang "Cielito Lindo (Lovely Sweet One)", the well-known lilting refrains of "Ay, ay, ay, ay, canta y no llores", imploring everyone "sing and don't cry".
"Our motto was play with the love of winning and not the fear of losing", Osorio said. "We decided on Hirving Lozano as he is our fastest player".
North American soccer has always been magnitudes below Europe and South America's best.
Spectators watched the match on a big TV screen in the central Zocalo square and after the game, they converged around the iconic Angel of Independence monument waving Mexico flags.
Loew, who has been in charge since 2006 and recently signed a contract extension to 2022, also raised eyebrows a few weeks ago when he did not include Leroy Sane, the English Premier League's young player of the year, in his final World Cup squad.
Eid to be celebrated tomorrow
Holy Ramadan , observed by more than one billion Muslims around the world, is celebrated in Azerbaijan on June 15 this year. King Salman also thanked Allah for having helped Saudi Arabia "remain adherent to Islamic Shariah law".
"Our stability is not good, you have to say - often only Jerome [Boateng] and I were at the back, so they mercilessly attacked us".
Mexico took control after that and looked the more unsafe team on attack with Manuel Neuer pulling off a great save to deny Hector Herrera from long range in the 11 minute. If Javier Hernandez and Carlos Vela had been sharper, Mexico could have won by several goals. Fans swinging the Mexican flag. "Everybody is really unhappy and crestfallen but we have to put this behind us", said Low.
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. That defeat to Germany followed a 7-0 mauling at the hands of Chile a year earlier at the Copa America Centenario.
Mexicans celebrating their win over Germany. But right now it is clear that Germany are there for the taking, and the World Cup might be too. "Everybody in Mexico wants that fifth game". Only two teams prior, Italy in 1938 and Brazil in 1962 had managed to do it. "Teams develop and change, players finish their careers and you must bring in new players which makes it the most hard achievement". But, coach Juan Carlos Osorio recently steered the team in an exceptional way and is now at least hoping for a draw in their opener.
Ozil, 29, endured an inconsistent season for Arsenal, but such is his brilliance at global level, that the playmaker's position in the national side has never really been under threat.
Germany was a heavy favorite going into the match.