After the match that led to Chelsea's defeat against Manchester City by 6 goals to nil, the Chelsea's manager Sarri just left the pitch without responding to Guardiola (Manchester City's manager). One would conclude that he was so pissed that he decided to snub Guardiola.
In Guardiola's defence, he said that he didn't see Guardiola, all he wanted to do was to get to the dressing room and he was not just seeing Guardiola. These are his words:
“I didn’t see him at the time but I will go to say hello to him later, as usual.
“I wanted to go to the dressing room and in the moment I didn’t see him. I have no problem with him,”