Portugal made it three wins in a row in the UEFA Nations League with a 3-1 victory away to Poland on Saturday night.
Coach Roberto Martinez handed a recall to all-time leading scorer Cristiano Ronaldo, while Ruben Neves was also back in the Portugal midfielder.
The visiting side got the breakthrough on 26 minutes when Bernardo Silva drilled the ball into the back of the net after being teed up by Bruno Fernandes.
Portugal did not have to wait long for a second goal, with Ronaldo firing home from close range after Rafael Leao saw his shot hit the post.
Piotr Zielinski did pull a goal back for Poland on 78 minutes, but an own goal from Jan Bendnarek sealed the win for Portugal.
Spain 1-0 Denmark
Spain cemented top spot in Group 4 with a 1-0 win over Denmark on Saturday evening.
La Roja had to wait until the 79th minute for the game's opening goal as Martin Zubimendi found the bottom corner with a lovely strike.
As a result, Denmark suffer their first loss and remain in second spot.
Serbia 2-0 Switzerland
Serbia are up and running in Group 4 following a 2-0 win over Switzerland on Saturday night.
The visiting side were gifted the opening goal just before the halftime break, with Nico Elvedi deflecting the ball into his own net.
Al Hilal striker Aleksander Mitrovic got the second goal for Serbia, who move up to third spot while the Swiss sit bottom.
Croatia 2-1 Scotland
Croatia rallied from behind to secure a 2-1 victory over Scotland at Stadion Maksimir.
The Scottish got off to the good start after Ryan Christie opened the scoring after 32 minutes.
The lead did not last long as Croatia were back on level terms four minutes later courtesy of a strike from Igor Matanovic.
The home side went on to grab the winning goal in the 70th minute, with Andrej Kramaric finding the back of the net.