This is the second leg of the quarterfinals after in the first one at Sevilla the German side prevailed winning 2-1.
This pick is about the total number of the cards received in the game. In that game at Sevilla there were 5 cards shown (3 to Bayern players and 2 to Sevilla while the last one was shown at the 90th minute).
Yesterday, in the first two matches of the second leg - there were 6 cards shown in the game between Liverpool and Man City and 5 cards at the Olympico in Rome between the local Roma and Barcelona.
The score is a tight one in this one and Sevilla will try to make some heroics and rescue at least the respectable result. I think the German side will counter in swift and merciless manner causing the Spaniards to react physically.
The refs have a very clear instructions to punish immediately the player endangering the others before the World Cup in less than two months.
So, I expect any acts of "mild" violence on the pitch to be punished in non compromising manner.