Jeison Murillo became Colombia's unlikely hero, scoring his first international goal to give his side a 1-0 victory over Brazil.
The Jose Pekerman-coached team closed ranks on Friday, undertaking a private training session at their ski resort base outside of Kazan and declining to comment on the Colombian police probe and their preparations for Poland, who were upset 1-0 by Senegal in their opener.
Radamel Falcao's hopes of playing at the World Cup finals hung by a thread on Thursday after his Ligue 1 club Monaco announced the Colombia striker required surgery on a left knee injury.
Chile beat Ecuador 2-1 in their closing South American qualifier in Santiago on Tuesday as both went through automatically to the 2014 World Cup finals in Brazil.
A senseless pitch invasion by Serbian fans in last month's Euro 2016 home qualifier against Albania has cost the Balkan nation dearly and the team fear the ramifications ahead of Friday's match against Denmark, Nemanja Matic said.