India, July 4 -- England national football team head into their FIFA World Cup Round of 16 clash against Mexico national football team with more than just the home crowd to contend with. The match will be played at Estadio Azteca, a venue renowned for its high altitude of roughly 2,240 metres above sea level. The thinner air and reduced oxygen levels are expected to make the contest especially demanding for Harry Kane and his teammates.

To help manage those conditions, reports suggest FIFA has cleared Thomas Tuchel's squad to use Viagra, a medication that is permitted under World Anti-Doping Agency regulations. Although widely known as a treatment for erectile dysfunction, the drug has also been researched for its potential to improve bl...