The second round of group matches at the 2026 World Cup begins on Thursday with four fixtures that will sharpen the contours of Groups A and B, none more consequential than the evening clash in Guadalajara between co-hosts Mexico and a buoyant South Korea. Both sides opened their campaigns with victories — Mexico subdued South Africa 2-0 in the tournament curtain-raiser, while the Koreans came from behind to beat Czech Republic 2-1 — meaning the winner at the Estadio Akron will seize outright control of the group and, depending on the earlier result in Atlanta, could secure the first berth in the expanded round of 16. Mexican supporters, still euphoric after the opening triumph at the Azteca, will pack the historic Guadalajara venue for the national team’s first World Cup match in the city, but they do so knowing captain and central defender César Montes is suspended after his red card against South Africa. Viewed from Seoul, that absence is an invitation: Son Heung-min and his colleagues are expected to probe a reshuffled back line, and Korean media note that a second consecutive win would represent a historic first for the Taegeuk Warriors at a World Cup.

Earlier in the day, Czech Republic and South Africa meet in Atlanta in a contest laced with jeopardy. Both lost their openers and understand that another defeat would leave them on the precipice of elimination with only one group match remaining. The Czechs, typically organised under Ivan Hašek, surrendered a lead against South Korea and paid for defensive lapses; South Africa, meanwhile, were overwhelmed by Mexico’s intensity and finished with nine men after two dismissals. The suspensions of Sphephelo Sithole and Themba Zwane compound the challenge for the Bafana Bafana, who have never advanced beyond the group stage in four previous World Cup appearances. Analysts in Johannesburg view this fixture as a test of whether Hugo Broos’s side can finally break that cycle, but the margin for error has vanished.

Group B, by contrast, remains a puzzle after all four teams drew their opening matches. Switzerland, expected to top the section, were held to a surprise stalemate by Qatar, while Bosnia and Herzegovina marked their second World Cup appearance with a first-ever point against Canada. On Thursday, Switzerland face Bosnia in Los Angeles and Canada take on Qatar in Vancouver, with each side chasing a first victory that would dramatically alter the group’s balance. European observers regard Murat Yakin’s Swiss as favourites given their experience, but the Bosnians showed resilience against the hosts and will not be easily broken. The Canadians, playing on home soil, will expect to impose themselves on a Qatari side that has already confounded predictions once.

From a global broadcasting perspective, the day’s action will be widely accessible: Brazilian audiences can follow all four matches across CazéTV, Globo and Sportv, Italian viewers have Rai and DAZN coverage, and Indonesian state broadcaster TVRI is carrying the Czech Republic-South Africa fixture. The staggered kick-off times — beginning at 13:00 Brasília time (17:00 BST) and culminating with Mexico-South Korea at 22:00 local time (03:00 GMT Friday) — reflect FIFA’s effort to serve multiple time zones in this tri-nation tournament. As the group stage enters its decisive phase, the outcomes in Guadalajara and Atlanta will not only shape the knockout bracket but also signal whether the co-hosts can sustain the momentum that has so far captivated a nation.