The first true shock of Russian Federation 2018 took place in Moscow's Luzhniki Stadium as Hirving Lozano's first half strike was enough to earn Mexico an underdog win against one of the World Cup favorites, and Twitter has reacted in kind.
Defending champions of World Cups haven't had a good time defending their title in the recent past, and Germany's defeat will put them under enormous pressure to turn things around in little time. Mexico coach Juan Carlos Osorio, who called it a "milestone" win, said his team executed his game plan to near perfection.
Germany, meanwhile, face an uphill task to become the first team to win back-to-back World Cups in 56 years.
However, their attempt to create history got off the worst possible start as they feel to a shock opening game defeat to Mexico.
Hirving Lozano's winning goal against Germany sparked wild celebrations in Mexico.
The resulting corner came back off the standing leg of Marvin Plattenhardt at the far post, but Manuel Neuer was aware of the danger and bailed his team-mate out with a good claim.
Mexico is not the clear favorite in Group F but they will definitely try to take avenge of the 4-1 defeat against Germany on their last encounter.
Germany coach Joachim Loew did not mince his words, saying: "We played very badly". With both German full-backs pushing forward, Mexico were able to play long balls out from the back to spring an attack.
"In all due respect, in the first half we were the better team".
Osorio had to endure vociferous criticism after a 7-0 defeat by Chile at the Copa Centenario in 2016 and again after their performances at the Confederations Cup past year, including a semifinal defeat to Germany. Due to injuries, we had to change some of our protagonists, but we always thought of having two fast players on the wing, " Osorio said. El Tri can't afford to waste the number of chances they had against Germany in future games against South Korea and Sweden.
Try our World Cup Quiz! Even though Germany outshot Mexico 25-12, had 61 percent possession and completed 519 passes to Mexico's 224, El Tri was the most unsafe team for much of the night. Die Mannschaft breezed through World Cup qualifying, winning ten out of ten, scoring 43 and conceding just four, and lifted the FIFA Confederations Cup previous year with a youthful squad, while Low recently penned a contract until 2020.