Paddy McNair scored twice as Northern Ireland's sublime first-half showing was enough to earn a thrilling 3-2 win over the Czech Republic.
Alexis Sanchez could be sidelined for "two to three" months after sustaining a potentially serious ankle injury, according to Chile coach Reinaldo Rueda.
Argentina captain Lionel Messi will make his return from suspension in November, insists head coach Lionel Scaloni.
Colombia and Chile drew 0-0 in a boisterous friendly that saw heavy challenges flying between the South American rivals.
Brazil was unable to mark Neymar's 100th cap with a win as it was held to a 1-1 draw by Senegal in humid conditions in Singapore.
Paris Saint-Germain expect to be without Neymar for four weeks because of a hamstring problem.