The major talking point of the match at St James' Park was a clash between Newcastle striker Papiss Cisse and United defender Evans that may prompt disciplinary action from the Football Association.
Evans appeared to spit towards Cisse, who seemed to react by spitting back at the Northern Irishman, but referee Anthony Taylor did not take action.
"I think we have dominated for 90 minutes," Van Gaal said.
"It was maybe our best match of the season, especially in an away match. We deserved the victory."
We haven't heard the last of this.