The Champions League returned on Tuesday night when Liverpool lost 2-0 against Red Star Belgrade and Tottenham defeated PSV Eindhoven 2-1.
Napoli and Paris Saint-Germain played a 1-1 draw as Inter Milan also played in Barcelona.
There was a lot behind the scenes, so here, Sports mail has put together seven things that you may have missed.
Harry Kane scored a late winner for Tottenham on Tuesday night against PSV Eindhoven
Red Star Belgrade does not warm up in the stadium
The hosts warm up on a training pitch next to the Rajko Mitic stadium, leaving half of the pitch unused before kicking off.
Liverpool coach Jürgen Klopp was therefore unable to keep an eye on the opposition's preparations, as is customary with him.
Liverpool and Monaco set unwanted records
Liverpool conceded two goals in seven minutes in Serbia in the first half.
It was the first time they had scored more than one goal in the first season of a Champions League match in four years.
Monaco were meanwhile the first French team to score three goals in the first 25 minutes of a Champions League home game when they lost 4-0 to Bruges.
Borussia Dortmund finally admits
Borussia Dortmund has flown this season and sits at the top of the Bundesliga.
The team of Lucien Favre finally collected their first goal in the Champions League on matchday four.
Borussia Dortmund conceded their first goal this season at Atletico Madrid
Klopp shows respect
Klopp wore a Serbian Phoenix flower on his coat during Liverpool's defeat to Red Star Belgrade.
It is a symbol of the Armistice Day for the Serbs who lost their lives in the First World War.
Klopp wore a Serbian Phoenix flower on his coat while Liverpool was defeated on Tuesday night
Milan Pavkov is unstoppable
Liverpool struggled to stop forward Red Bull Belgrade striker Milan Pavkov as he scored both goals.
And nothing would stop him from enjoying the victory with the fans of the club.
He showed himself climbing a rope in the home area to celebrate with followers.
Milan Pavkov of Red Star Belgrade accompanies the supporters of the club to celebrate after the victory
He showed himself climbing a rope in the home area to celebrate with followers
All eyes on Wembley
On Tuesday evening, all eyes were on the state of the pitch in the National Stadium.
NFL markings were clearly visible when Manchester City visited Wembley last week and the turf was heavily shaken in some places.
The playing area was in a better condition for the visit of PSV Eindhoven.
On Tuesday evening after last week, all eyes were on the stand in the National Stadium
Suarez continues to wait for a target while Messi continues to watch
Luis Suarez has not found a network in other European countries since September 2015.
The striker knocked on the door again and again, but could not find this important destination in San Siro.
Meanwhile, Lionel Messi watched from the stands as Barcelona was held by Inter Milan.
Luis Suarez has not found an away game in European competition since September 2015
Lionel Messi watched from the stands as Barcelona was held in the San Siro of Inter Milan