Portugal opened their Nations League defence with a dominant 4-1 win over Croatia, while world champions France, Belgium and England also recorded victories.
Even striker star Cristiano Ronaldo, who failed with a reported bee sting, Portugal were too strong for Croatia in Porto. Joao Cancelo, Diego Jota, Joao Felix and Andre Silva gave the defending champions a winning start in Group A3 despite the consolation of Bruno Petkovic.
In the other game, Kylian Mbappe scored for France in the 1-0 win over Sweden in Stockholm.
Belgium won 2-0 in Group A2 in Denmark after England had earlier triumphed 1-0 in Iceland.