Bolivia can beat Copa America Group A leaders and host nation Chile to top spot, according to defender Edward Zenteno.
Friday sees Chile and Bolivia go head-to-head at Estadio Nacional Julio Martinez Pradanos, with only goal difference separating the two nations in Santiago.
"We want to finish first in the group, we know it will be tough," Zenteno told reporters.
"The aim is to do good things on Friday and go through as the best in the group.
"We are happy, but we will not lower our guard. We are mentally prepared to have a good performance in every game - the confidence is there."
Star midfielder and Copa America's top goalscorer with three goals, Arturo Vidal, had his driver's licence revoked for drink-driving after he was involved in a car crash, while driving under the influence of alcohol on Tuesday.
Sanchez underwent an MRI after feeling pain in his right leg and the forward could miss Friday's showdown in the Chilean capital.
