Thomas Tuchel has publicly labelled the 2,240-metre elevation of the Estadio Azteca a “big disadvantage” and confirmed England will adopt a high-risk, late-arrival strategy for Sunday’s round-of-16 match against Mexico. The German manager told British media that his squad would travel from their Kansas City base on Friday evening, entering the thin air of the Mexican capital inside what performance experts call the “36-hour window” – a period before the body’s severe physiological responses to hypoxia fully take hold. “The recommendation is you either go 10 days before – which is too long for us – or last minute, which is not allowed,” Tuchel said, adding that the ball would “fly maybe five yards more” and that full physical adaptation in four days was “just impossible.”

At the core of the challenge is hypobaric hypoxia: as elevation increases, the partial pressure of oxygen drops, reducing the amount of oxygen that binds to haemoglobin. The US Centers for Disease Control and Prevention notes that the body attempts to compensate by raising heart and breathing rates, while symptoms can include headache, nausea, dizziness and confusion. Scientific commentary in the American press distinguishes between elevation – the height of a geographical feature above sea level – and altitude, the vertical distance of an object above the earth’s surface, but the practical effect for athletes is the same: a measurable decline in aerobic capacity. England’s highest professional stadium, the Hawthorns, sits at just 168 metres, a fraction of the Azteca’s elevation.

Mexico have turned that physiological reality into a formidable competitive asset. Javier Aguirre’s side have won all three group-stage matches at the Azteca without conceding a goal, defeating opponents who tried contrasting acclimatisation methods. South Africa spent ten days in higher-altitude Pachuca and lost 2-0; the Czech Republic arrived on the eve of the match and were beaten 3-0; Ecuador, whose players complained of disrupted sleep after fans staged a noisy serenade outside their hotel, fell 2-0. Viewed from London, the Ecuador episode has prompted extraordinary precautions: the location of England’s hotel is being kept secret, white-noise machines will be deployed, and the team will train in a closed session at the Pumas training ground, with only essential personnel permitted.

Mexican voices have added their own warnings. Formula One driver Sergio Pérez, speaking at the British Grand Prix, advised the English to arrive “a week in advance” and not to underestimate the difficulty of breathing. “The Mexican fans are really very good, they will be very happy to receive you,” he said. “We hope the English have fun in our country… but only the fans, not the players.” That sentiment was echoed by former West Ham captain Nigel Reo-Coker, who told a British tabloid that playing at such elevation was the most physically demanding experience of his career: “You can’t breathe. For the first 45 to 55 minutes, you are literally just trying to continue breathing.”

The winner will advance to a quarter-final, and for England the fixture carries a particular historical weight: it is their first match at the Azteca since the 1986 quarter-final defeat to Argentina, a game defined by Diego Maradona’s “Hand of God”. Mexico, meanwhile, have lost only twice in 89 matches at the stadium. Cool, rainy weather is forecast for the evening kick-off, but the deeper test will be whether Tuchel’s calculated gamble on a late dash can blunt the home side’s most enduring advantage.