A wild opening day in Mexico and a sharp South Korean response in Guadalajara set an immediate tone for the expanded tournament before Canada steps into the spotlight.

The 2026 World Cup opened with the kind of volatility that makes a giant tournament feel even bigger. Two Group A matches launched the 39-day, 104-game event across Canada, the United States, and Mexico, and both games suggested that the new 48-team format may deliver more twists than anyone can fully predict. For Canadian supporters, the first day doubled as a preview of the pressure, speed, and emotion their own team will soon face.

What stood out most was not just the results, but the contrast. One match exploded with goals, cards, and noise. The other turned into a tense comeback built on composure and tactical patience. Together, they offered an early snapshot of what this tournament may become.

Mexico Open With Noise, Goals, and Discipline Issues

The tournament began at the Estadio Azteca in Mexico City, where a massive crowd helped create a setting that felt more like a final than an opener. The pregame atmosphere included performances from Shakira and Maná, but the real drama arrived almost immediately once Mexico met South Africa.

The first goal came in the ninth minute, and it was the kind of moment that can define an entire opening night. Erik Lira seized on a poor attempt to play out from the back, and Julián Quiñones finished calmly through Ronwen Williams’ legs to score the first goal of the tournament. Mexico then added another emotional high point when Raúl Jiménez headed in his first World Cup goal, a moment made even more powerful because of the serious head injury he suffered in 2020. His reaction after scoring told the story better than any stat line could.

The match, however, became memorable for something far less elegant: the cards. Referee Wilton Sampaio sent off three players, which made it the most red cards ever shown in a World Cup opener and the first World Cup match in two decades to feature three dismissals. South Africa lost Sphephelo Sithole before halftime and Themba Zwane after a video review caught a swipe at Roberto Alvarado. Mexico later went down to 10 men as well when César Montes was dismissed for stopping a South African break. All three players now miss the next group match.

For Mexico, the victory carried both symbolic and practical value. The hosts had never won their opening World Cup match before, having drawn twice and lost five times in prior attempts, so the result marked a genuine first. It also came with a clean sheet, a sharper attacking rhythm than many expected, and a prominent role for 17-year-old midfielder Gilberto Mora, one of the young players drawing the most attention in the early days of the tournament.

South Korea Show Steel in Guadalajara

The second Group A match looked very different. In Guadalajara, South Korea and Czechia played in front of a crowd that never fully filled Estadio Akron, but the game itself grew in intensity as the minutes passed. South Korea trailed, then recovered, then held on with enough discipline to make a strong early statement.

Czechia found the breakthrough first. In the 59th minute, captain Ladislav Krejčí rose to meet a long throw and headed in the opening goal, which fit the direct style Czechia had used throughout qualification. South Korea’s answer came quickly and with much more finesse. Eight minutes later, Lee Kang-in slipped a precise pass to Hwang In-beom, who used a clever feint to freeze two defenders and the goalkeeper before placing the equalizer into the corner. The move featured 25 passes, one of the longest sequences ever recorded before a World Cup goal.

The game still had more late tension to offer. Tomáš Souček appeared to restore Czechia’s lead with a header in the 77th minute, but the flag went up for offside and review upheld the call. Three minutes later, South Korea made that decision hurt. Substitute Oh Hyeon-gyu, who said afterward that a 38-degree fever had made him doubt he could even play, finished Hwang’s low cross for the winner. Kim Seung-gyu then protected the result with a key save deep into stoppage time.

South Korea ended with the stronger numbers and the more convincing finish. They produced 15 shots compared with Czechia’s eight and looked calm enough under pressure to suggest they could become one of the tournament’s most dangerous under-the-radar teams. Captain Son Heung-min also reached another career marker, becoming one of only two South Koreans to appear at four World Cups, alongside coach Hong Myung-bo.

What the First Day Means for Canada

Opening day gave the tournament a clear early storyline, and it also sharpened attention on the next host nation due to play. Canada begins its campaign on Friday at a sold-out BMO Field in Toronto against Bosnia and Herzegovina, in the first men’s World Cup match ever played on Canadian soil. That alone gives the fixture historic weight, but the bigger picture is even more important: Canada is entering a tournament that already looks restless, fast, and unpredictable.

The structure of the group stage matters too. Canada shares Group B with Bosnia and Herzegovina, Qatar, and Switzerland, and the rest of its matches will be played at BC Place in Vancouver. That means the team can settle into a familiar home rhythm after the opener, but the first step still has to be taken in front of a crowd expecting a strong start.

• Mexico opened with a 2-0 win and a clean sheet.
• South Korea came from behind to beat Czechia 2-1.
• Three red cards in one opener set an unusual tournament tone.
• Canada’s first match will be the country’s first men’s World Cup game on home soil.

That combination of results and milestones gave the opening day extra weight. It was not simply a pair of Group A games; it was a warning that this tournament is likely to move quickly, swing wildly, and reward teams that stay composed when the atmosphere turns sharp. Mexico and South Korea took control of the early table, but the larger message was aimed at everyone else waiting for their chance. The World Cup has arrived, and it has already shown that it intends to be loud from the start.