Chelsea boss Antonio Conte was sent off as his team earned a 1-0 win over Swansea City.
Conte spent the whole of the second half watching from the stands after disputing referee Neil Swarbrick's decision not to award a corner when the game was goalless.
Chelsea dominated but had to wait until the 55th minute to find the breakthrough, Germany defender Rudiger heading home after N'Golo Kante's shot was deflected into his path.
Swansea offered stubborn resistance did not have a shot on target as they fell to a fifth defeat in six Premier League games.
Conte said afterwards: "The problem is I was frustrated because the opponents were wasting time. I tried to tell this to the fourth official not only once but a few times.
"But I have apologised because I did the wrong thing. I have been in to see them after the game. It's right to speak and apologise with them.
"I don't know if it was fair [to be sent off] but we have to respect this decision. Sometimes there is a lot of frustration like in this case but sometime you can make a mistake and I did this."
Source: tribalfootball.com