England face Mexico at the high-altitude Estadio Azteca in the World Cup Round of 16, with reports suggesting the "blue pill" could help players cope.
England players will have an unusual option available to them as they prepare to face co-hosts Mexico in the Round of 16 at the 2026 World Cup: the "blue pill." With the Three Lions set to battle extreme high altitude at the iconic Estadio Azteca in Mexico City, reports suggest that Viagra — not currently on the World Anti-Doping Agency's list of banned substances — could be used by medical staff to help players cope with the physical toll of the elevation.
The Estadio Azteca sits at roughly 2,240 metres (7,220 feet) above sea level, a height at which reduced oxygen pressure can trigger fatigue, dizziness, nausea and shortness of breath — symptoms commonly grouped together as altitude sickness. Some studies have found that sildenafil, the active ingredient in Viagra, can help ease these effects by reducing blood pressure in the lungs, improving how efficiently oxygen moves through the body.
Thomas Tuchel's side will not have adequate time to properly acclimatise to the conditions, having only beaten DR Congo three days earlier in Atlanta to book their place in the Round of 16. Tuchel has been blunt about the challenge, admitting it is "impossible" for his squad to adapt to the Mexico City altitude in such a short window, given England have been based in Kansas City and travelling between venues throughout the tournament.
To be clear, there is no confirmed plan for England's medical staff to actually administer the drug — the decision remains entirely at the discretion of team doctors, and its use as an altitude aid is speculative rather than an established part of England's preparation. But because sildenafil isn't prohibited under WADA rules, it remains a legal option on the table if medical staff decide the benefits are worth it.
Beyond the physiological challenge, England face a Mexico side that has been imperious on home soil. El Tri have won all four of their games so far in this World Cup and have yet to concede a single goal in the tournament, following group-stage wins over South Africa, Czechia and South Korea before dismantling Ecuador in the Round of 32. At the Azteca specifically, Mexico have lost just twice in 88 matches, with a nine-game unbeaten run and 69 wins at the venue — turning it into a genuine fortress.
England will lean heavily on the in-form Harry Kane, who scored twice in the final 15 minutes to rescue his side from a shock exit against DR Congo, moving him past Brazilian legend Pelé to 13 World Cup goals — five of them coming in this tournament alone. With Mexico's defence yet to be breached, Kane's clinical edge could prove decisive.
Rather than relying on relentless pressing — a tactic that would leave them gasping for breath at altitude — England are expected to slow the tempo, control possession and pick their moments carefully, prioritising hydration and recovery between spells of intensity. Whether or not the "blue pill" talk amounts to anything on matchday, it's clear Tuchel's side will need every physiological and tactical edge they can find to reach the quarter-finals.
