Tyler Adams' first international goal helped the United States to a 1-0 win over rival Mexico in Nashville.
Spain hammered Croatia in Luis Enrique's second match in charge, and Marco Asensio thinks their old positivity is returning.
England were poor before half-time against Switzerland but improved after the break as Marcus Rashford scored the only goal.
Belgium were below their brilliant best in Iceland, but Eden Hazard and Romelu Lukaku secured an ultimately comfortable win.
Portugal's Nations League campaign got off to a promising start, as they beat Italy 1-0 despite Cristiano Ronaldo's absence.