Rasmus Hojlund needed only 14 minutes of his Napoli debut to find the net as he helped them to a 3-1 win at Fiorentina that extended their perfect start to the Serie A campaign.
Napoli were already 1-0 up through Kevin De Bruyne's penalty - the Belgian's second Napoli strike - before Hojlund, on loan from Manchester United, latched on to Leonardo Spinazzola's through ball and applied the finish.
Sam Beukema then made sure of the points six minutes into the second half, with Luca Ranieri's 79th-minute goal too late for Fiorentina to threaten a comeback.
Vasilije Adzic's stoppage-time strike gave Juventus a 4-3 win over rival Inter Milan.
Hakan Calhanoglu had twice equalised from Inter after strikes from Lloyd Kelly and Kenan Yildiz, and Marcus Thuram put the visitors ahead before Khephren Thuram levelled for Juve.
Ten-man Real Madrid hung on to beat Real Sociedad 2-1 and maintain their perfect start in LaLiga.
Kylian Mbappe gave them an early lead but Dean Huijsen controversially saw red in the 31st minute for denying a goalscoring opportunity.
Arda Guler doubled Madrid's lead just before the hour and it proved vital as Mikel Oyarzabal pulled one back from the penalty spot before Sociedad piled on pressure in the closing stages.
Atletico Madrid got their first league win of the season at the fourth attempt as goals from Pablo Barrios and Nicolas Gonzalez saw off Villarreal.
Harry Kane scored a brace as Bayern Munich maintained their perfect start to the Bundesliga campaign with a 5-0 rout of Hamburg.
Serge Gnabry opened the scoring and Aleksandar Pavlovic made it 2-0 as early as the ninth minute.
Kane's first and a Luis Diaz strike put Bayern 4-0 up after 29 minutes, with Kane's second coming from the spot in the second half.
Serhou Guirassy and Maximilian Beier were on target as Borussia Dortmund beat 10-man Heidenheim 2-0.
Wolfsburg and Cologne shared the points from a dramatic 3-3 draw, with three goals in stoppage time.
