— -- With the United States out of the World Cup, want to make sure you're rooting for the winning team?
Ask Cortana for advice.
Microsoft's smartphone virtual assistant has a perfect track record of picking World Cup outcomes since the beginning of the knockout round this past weekend.
While it's unclear if Cortana has a favorite team, she knew Belgium would pull off a win against the United States in Tuesday's dramatic overtime match.
Cortana is powered by Microsoft's Bing and gets her sage insight from the search engine's prediction technology.
So what's on tap for the holiday weekend?
Cortana predicts Brazil will beat Colombia and Germany will top France on July 4. On Saturday, Argentina is predicted to emerge victorious against Belgium, while the Netherlands is favored to beat Costa Rica.
Stay tuned to see if Cortana is correct.
Sign up for occasional World Cup dispatches from Brazil delivered right to your phone -- including the best photos and limited highlights -- by "starring" this story in ABC News' phone app. Download ABC News for iPhone here or ABC News for Android here.