You may not have seen the 50-man brawl at the end of Sporting's 2-2 draw with Porto involving players, coaches, kitmen, stewards, and even ballboys, but Pep Guardiola certainly did.
The Manchester City manager watched that game on Friday night as Sporting let a two-goal lead slip and five red cards were shown overall. That was part of Guardiola's homework ahead of this Champions League last-16 first leg.
He's since said his side should expect to face an organised team who are good in transition, meaning they like to win the ball then attack in no time at all.