Real Madrid did the business again when it matters in the Champions League, making up for their poor form in La Liga this season by putting one foot through the door towards the Champions League final.
Goals from Marcelo and Marco Asensio atoned for conceding early on, and Zinedine Zidane's side again showed character as they came from behind to take a convincing lead into the second leg in Madrid.
Here's what we learned from the first tie.
3. Sergio Ramos Shows His Worth
After Sergio Ramos returned to the starting line up following his second leg suspension against Juventus in the quarter-finals, the captain demonstrated why Real Madrid are a completely different side with the Spaniard bossing the back four.
Despite conceding early on from a Joshua Kimmich strike, from then on the centre-back marshalled the back four excellently, winning a number of tackles and blocking as if his life depending on it.
2. Zinedine Zidane Sends Clear Message to Gareth Bale
To any keen observer, once the Real Madrid line up was uploaded online and around the stadium, the fact Gareth Bale was dropped told two stories. The first was how he is no longer seen as a key player in the starting eleven, with Isco and Lucas Vázquez preferred.
More importantly, after his flirting in the media with a possible move to Bayern Munich mooted in the summer, with the Madridistas never truly taking to the Welsh forward Zidane made sure that Bale understood - on the eve of such an important match - that if his focus is averted, his place is no longer guaranteed.
Even more surprising and telling was how the midfielder didn't even make it off the bench...
1. Bayern Munich Need to Take Their Chances
It's no good ducking your heads in shame when the going gets tough. The true sign of champions is not letting setbacks get the better of you, which is what Real Madrid have done brilliantly since Zidane took the hot-seat.
If statistics won the tie, in the first leg Bayern Munich will be kicking themselves for not taking full advantage of their dominance. More than 60% possession and 17 shots to Real Madrid's seven demonstrates how wasteful the Bavarian's were in front of goal.
The likes of Robert Lewandowski had a nightmare as Marcelo and company showed the German giants how taking your chances is key to advancing in the major competitions.