Four things we learned from the USMNT’s Gold Cup group stage

The United States struggled in friendlies but went on to win all three of its Gold Cup group games. On Sunday against Costa Rica, they face their biggest test yet.

For as much as the Gold Cup gets denigrated, it's a much tougher tournament than it might appear. The ongoing tournament is the 11th edition in the last two decades, and this year's US are just the 10th team to make it through three group matches unscathed (Panama became the 11th on Tuesday).

US manager Mauricio Pochettino has to be pleased with his team's performance. After rough showings in the pre-tournament friendly matches, a 5-0 win over Trinidad and Tobago was cathartic, while a 1-0 win over Saudi Arabia and a 2-1 victory against Haiti also showed that the US are trying to make winning a habit as their manager has asked.