As Shovkovsky moved off his line to collect, Aleksandar Dragovic attempted to head it out for a corner, only to inadvertently divert the cross into the empty goal.
Sergei Krivets' free-kick dipped into the area and Boyata headed it out, but only into the back of Arboleda's head, from where it rebounded back past a surprised Shay Given in the City goal.
The German goalkeeper is nothing if not decisive and beats the Algeria forward to the bouncing ball by a split second, heading it out for a throw-in before the inevitable collision between the two players.
Ouseley, who heads Kick It Out, one of the leading anti-discrimination bodies in England, added the latest incident would also test new sanctions issued by Uefa.
Nemanja Vidic headed it out of defense.
No United States players were made available to the news media after the match, but Berhalter, in a statement, said: "I headed it out of bounds.
Sometimes the head makes it out, but the shoulders get stuck behind the pubic bone of the mother's pelvis.
If the sales job you had 20 years ago does not relate to where you are headed, leave it out or summarize it very briefly, she said.
