Miazga became rattled when Lainez snapped away at his ankles while he shepherded the ball from danger in the 64th minute with the scores at 0-0, and confronted the pint-sized player about his zealousness. The Nantes defender, on-loan from Chelsea, won it and was fouled by the Club America teenager.
Tempers flared further, with the linesman and the referee having to break the fracas up, though the only yellow card was issued to Alvarez.
Zaldivar said after the game that he didn't think he should've received a red card, indicating he slipped when attempting to tackle Trapp.
Minutes later, Adams would find the breakthrough that proved the difference in the victory.
Speaking to reporters after the match, Miazga looked to play down the clash: 'It's normal. A little run-in. It's nothing. The gestures were a clear giveaway about US' Miazga's intention to mock Lainez's height.
The U.S. continues playing friendlies next month against Colombia and Peru.
The left-footed Robinson, burned by Diego Costa with a cross that led to Brazil's opening goal in a 2-0 loss Friday, had replaced right-footed Eric Lichaj at left back in the 56th minute.
After being whistled, Yedlin demanded of the referee "Did you watch the World Cup" in relation to Neymar's notorious dramatic falls during the tournament in Russian Federation.