Speaking to Sky Sports, Guardiola said: "He's a little bit frustrated, but I understand. He was frustrated with the referee. With the long balls sometimes they push him and he is pulled. Yes, it is like that. [The win] looks comfortable but it was not. In the end, we created more chances but in the transition, we were not precise in the last pass. But Erling is back to business. Penalties are a guarantee but the second and fourth [goals] were unbelievable."