Manchester City were losing at this point, but then ended up winning thanks to Raheem Sterling. The striker went on to score a hat trick in about ten minutes.
But Atalanta got their hopes up, especially when Rodrigo got injured. The midfielder had to leave the pitch and John Stones took his place.
Guardiola told him to change quickly and put on his socks and shinpads to jump onto the pitch to cover his team-mate's gap, and he did, but after hearing the coach's reprimand.
The cameras picked up how Pep climbed the stairs of the bench and hit the seats quite angry at his player's lateness, which ended up increasing the speed to prepare.
Players like Silva were not impressed because they know how Guardiola is, who left one of the images of Tuesday in the Champions League.