Tuesday's World Cup qualifier brings together two teams with great hopes of qualifying for Brazil 2014, as first-place Argentina visit the heights of Quito to take on Ecuador. The Tricolor stumbled to a 1-0 defeat to Peru but still find themselves in third place in the Conmebol standings, and a fantastic record at home means they will fancy their chances against Alejandro Sabella's men.
The Albiceleste coach, meanwhile, has seen his hand forced, as injury and suspension oblige him to make several changes to the side that drew 0-0 against Colombia. Gonzalo Higuain and Pablo Zabaleta are suspended, while Lionel Messi is still struggling for fitness and could start off the bench once more.
On paper, Argentina should be clear favourites, but the altitude always plays a key part in Ecuador's home clashes, and Reinaldo Rueda's men will be hopeful of recording a seventh straight home victory against their South American rivals.
We bring you the most intriguing head-to-head clashes from Tuesday's game, as the World Cup qualifying campaign moves into its final stages.