Chile begin their Copa America title defence against 2016 front-runners Argentina on Monday, and the challenge awaiting head coach Juan Antonio Pizzi at Levi's Stadium in Santa Clara, California, could define their tournament.
The Group D combatants begin their Copa Centenario campaigns on the United States' West Coast hoping to boost their respective title pushes, but both teams have big injury concerns heading into the opener.
Most notable among those for La Albiceleste is captain Lionel Messi, having suffered a knock in his side's recent friendly against Honduras ahead of this summer's centenary tournament.
Meanwhile, Chile are hoping star midfielder Arturo Vidal will be fit to feature in their curtain-raiser, and Monday's clash is likely to be heavily influenced by which of the duo can prove his fitness level.