Last night Bolivia hosted Argentina in a World Cup qualifier that finished 1-1 in La Paz. The game was played in the Estadio Hernando Siles, nearly 12,000 feet above sea level. The altitude clearly affected world class players like Leo Mess and Angel di Maria and watch this video as Argentina players struggle to breathe.
It's not an everyday experience to see world class athletes requiring an oxygen mask to play football.
The draw leaves Argentina on top of the South American qualifying group after 11 of the 18 games. Bolivia, despite the advantage of playing their home games at altitude, have struggled in the group. Their only 2 wins have come at home though.