Humbled by Mexico in their previous friendly, Gregg Berhalter saw reason for encouragement as the United States held Uruguay.
Mexico lost for the first time under Tata Martino on Tuesday, but the coach is not too concerned and hopes to learn from playing Argentina.
Argentina fought for themselves, for each other and for their country against Mexico, says proud coach Lionel Scaloni.
Brazil lost to Peru on Tuesday, dealt their first defeat in over a year, but Fagner hoped to use the experience as a positive.
After scoring his first international hat-trick, Lautaro Martinez revelled in his display for Argentina against Mexico.
Luis Abram's 85th-minute header saw Peru past Brazil, while condemning the Selecao to their first defeat since the 2018 World Cup.
Argentina thrashed Mexico 4-0 thanks to a stellar performance from forward Lautaro Martinez.
The United States came from behind to earn a draw against Uruguay in a friendly.
Republic of Ireland coach Mick McCarthy still plans to hand over to Under-21 boss Stephen Kenny after the Euro 2020 finals.