It was a big night in Europe for FK Qarabag, who managed to hold their illustrious opponents to a draw. In the end, a dispirited Atletico Madrid could not muster a single goal away in the Azerbaijani capital of Baku.
Elsewhere, Jupp Heynckes’ revival of Bayern Munich is well underway. The septuagenarian manager returned to winning ways in the Champions League after a lengthy hiatus: his team running out 3-0 winners in the Allianz Arena against Brendan Rodgers’ Celtic.
Over in London, Chelsea’s implosion continues apace as they could only scrape a point at Stamford Bridge against AS Roma. In the end, though, the night belonged to a certain teenage goalkeeper…
Here are four things RealSport learned from Wednesday’s fixtures.
1 There is such a thing as life after the Premier League
It turns out that Edin Dzeko, the man discarded by Manchester City in 2015, is actually a decent player after all. The Bosnian never truly settled at Eastlands but a move to Roma has seen him blossom into one of Europe's most lethal marksmen. It was his two goals that secured a vital 3-3 draw against Chelsea on Wednesday night.
The scorer of the other Roma goal? Fellow Premier League reject Aleksandr Kolarov. Jose Mourinho must be getting jealous of another club letting players go who then go on to be more successful elsewhere...
2 Joshua Kimmich is the best right back in Europe
It is becoming abundantly clear that Joshua Kimmich is fast becoming the best right back in world football: not simply because of his expertly guided header against Celtic on Wednesday night; nor because of his wonderfully-timed volley against Northern Ireland in the last round of World Cup qualifiers.
Kimmich is a superb athlete, blessed with an incomparable technique and the intelligence to perform across the entire defence and midfield. Quite simply, he is a phenomenon for whom Brendan Rodgers and Celtic had no answer.
3 David Luiz will be David Luiz.
Keep on keeping on, David. After scoring a suitably ridiculous opener against Roma on Wednesday night, the Brazilian brought further attention to himself with a petulant reaction to Antonio Conte's decision to bring him off.
"David Luiz had a little problem in his calf and in this moment I can't risk my players," mused the Chelsea boss after the game. It didn't have anything at all to do with his side conceding a two-goal lead then? Nope. Nada.
4 Hairbands can be really distracting
Just ask Benfica's 18-year-old goalkeeper Mile Svilar. The Belgian was making his first appearance in the Champions League against Manchester United on Wednesday and he was determined to be noticed, sporting a bright red hairband.
Noticed he would be, making a comical error on 64 minutes as he carried a Marcus Rashford free-kick over his own goal-line. The blunder was enough to seal another uninspiring result go in José Mourinho's favour. Not that the Portuguese cares, looking down his nose from the summit of Group A.
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