Norway opened their Nations League campaign with a thrilling 3-2 win over rivals Denmark.
Oscar Bobb opened the scoring in the 14th minute off a pass from Martin Odegaard, before Erling Haaland doubled the lead just four minutes later. Denmark fought back through Mikkel Damsgaard's 25th-minute free-kick and Rasmus Hojlund's 60th-minute equalizer.
However, Haaland struck again in the 74th minute to seal the victory, with Norway holding firm despite David Moller Wolfe's late red card.
Portugal secured a hard-fought 1-0 victory over Wales in their Group D opener.
The decisive moment arrived in the 22nd minute when Joao Felix netted the game's only goal, converting a key setup from left-back Nuno Mendes. Portugal dominated possession with 61% and created 20 total shots, maintaining full control throughout.
Wales struggled to find clear opportunities, managing just one shot on target as Portugal comfortably saw out the win.
Greece staged an impressive late comeback to claim a 2-1 victory against Serbia.
Andrija Zivkovic gave Serbia an early lead in the 4th minute, putting the home side ahead for much of the contest. Greece relentlessly pushed forward and finally broke through in the 74th minute with a equalizer from Christos Tzolis.
In dramatic fashion, substitute Anastasios Douvikas scored deep into stoppage time (90+5') to steal all three points for the visitors.
Jurgen Klopp was left encouraged by Germany's performance in his first match as head coach, despite seeing his side concede a late equaliser in a 1-1 draw with the Netherlands in the UEFA Nations League on Thursday.
Leeds United star Ethan Ampadu has demanded greater standards from Wales after their winless run was extended by a 1-0 Nations League loss to Portugal in Lisbon.
Kai Havertz was forced off injured during Germany’s 1-1 draw with the Netherlands, giving new manager Jurgen Klopp an early concern on his international debut.
Erling Haaland scored twice as Norway beat Denmark 3-2 in Oslo to claim their first competitive victory over their Scandinavian rivals in 28 years.
