Manchester City emerged from a cauldron in Madrid to book their place in the Champions League semi-finals and a date with Chelsea-conquerers Real Madrid.
City led 1-0 from the first leg and faced a barrage of Atletico Madrid pressure in the second half before Diego Simeone's side lost the plot and multiple scuffles ensued.
The game spilled over after a series of feisty Atletico challenges, not least one from Felipe on Phil Foden that resulted in him being shown a second yellow card.
Footage also appeared to show Stefan Savic, who appeared to take particular umbrage over the two legs with Jack Grealish, head-butting Raheem Sterling.