Three U.S. players and seven Slovakia players were yellow-carded in the affair in which Colby Agu (Capital Area RailHawks) scored the USA’s lone goal.
The USA booked its place in the final, which takes place Friday, with wins over Georgia (5-1) and Ukraine (2-1).
April 28 in Senica, Slovakia
Slovakia 3 USA 1. Goals: Tupta (Kristian) 5, Tupta 12, Tupta (Herc) 62; Agu (Fossey) 13.
Slovakia -- Szaraz; Susolik, Oravec, Janosik, 1 Nemcek; Herc, Krela (Baumgartner, 64), Lenart (4- Macho, 64); Vallo, Tupta (Dubec, 82+), Kvocera (Jedinak, 79).
USA -- Diaz; Fossey, Kibunguchy, Montalvo (Barbir, 40), Velela (Arellano, 39); Des Pres (De La Torre, 61), Egiluz; Da Silva (Young, 40), Gallardo, Espinoza (Hunsinger, 40); Agu (Vazquez, 61).