Czechia have led in both matches but failed to protect either advantage. Ladislav Krejci put them ahead against South Korea, while they held the lead against South Africa for almost 80 minutes before conceding too many chances.
That pattern has left Czechia third in the group and exposed a defence that has looked vulnerable once opponents apply sustained pressure. With no room for caution, Koubek is expected to keep faith with much of his starting side while demanding sharper concentration without the ball.
The challenge is significant. Mexico have opened the tournament with two wins and have conceded no goals, beating South Africa and South Korea. They have already secured top spot, but a third victory would complete a perfect group-stage record.
Patrik Schick carries much of Czechia’s attacking responsibility, yet the Bayer Leverkusen forward has endured two quiet displays. His club form last season, when he scored 22 goals, underlines the finishing quality Czechia need now.
Mexico’s defensive record makes patience important, but Czechia cannot afford another match in which their main striker remains peripheral. Set-pieces could provide an alternative route, particularly given Czechia’s height advantage, while Schick’s movement may be crucial in creating the second balls and rebounds that a controlled Mexico defence can usually suppress.
Mexico may also welcome back Cesar Montes, who missed the South Korea game through suspension after his red card against South Africa. His possible return would add another obstacle for Czechia’s forwards.
The next 90 minutes will decide whether Czechia finally reach the knockout stage for the first time in 36 years. Mexico have less pressure, but Czechia need urgency, defensive discipline and a decisive contribution from Schick from the opening whistle.