Eintracht Frankfurt began their Champions League campaign with a convincing victory over Galatasaray, while Copenhagen were held to a late draw at home by Bayer Leverkusen.
Frankfurt were the night's biggest winners as they beat Galatasaray 5-1, despite the Turkish visitors taking an early lead through Yunus Akgun. A Davinson Sanchez own goal brought Frankfurt level on 37 minutes, before Can Uzun and Jonathan Burkardt both netted in first-half stoppage time.
Burkardt struck again after the break, and Ansgar Knauff wrapped up a fine victory for the German club, who are top of the fledgling league standings.
Fellow Bundesliga side Leverkusen had to come from behind twice to snatch a point in a 2-2 draw away to Copenhagen in the Danish capital. Jordan Larsson's early opener for the hosts was cancelled out by a brilliant Alejandro Grimaldo free-kick.
Young Brazilian forward Robert restored the hosts' advantage on 87 minutes only for a Pantelis Hatzidiakos own goal in stoppage time to give Leverkusen a share of the spoils.
Club Brugge, who reached the last 16 last season, claimed a stunning 4-1 win at home to Monaco in Belgium, with an early penalty miss by Maghnes Akliouche for the visitors proving crucial. Nicolo Tresoldi, Raphael Onyedika and Hans Vanaken all scored in the first half for Brugge, and Mamadou Diakhon got their fourth before Ansu Fati grabbed a late consolation for Monaco.
Kazakhstan's Kairat Almaty travelled almost 7,000 kilometres to face Portuguese champions Sporting, and came away with a 4-1 defeat. Morten Hjulmand missed an early penalty for Sporting, but Francisco Trincao bagged a brace before Alisson Santos and Geovany Quenda netted quickfire goals in the second half. Edmilson pulled one back for Kairat, who host Real Madrid next in a fortnight.