When You Are The Best Player In The World: Even You Must Play At High Altitude:

"Argentina plays at home Saturday against Colombia, and then plays Wednesday against Ecuador in Quito. Messi was troubled by the altitude in a 6-1 defeat at La Paz, Bolivia (3,600 meters; 11,800 feet). Quito is slightly lower at 2,800 meters (9,000 feet)." (Source)