Ralfy said a bit more on the issue, the crux of it is covered in the tweets, but figured I'd post it:
In the post-match press conference, Rangnick added: “The only reaction I got was, ‘Why me? Why did you take me off?’
“I said to him ‘Listen, I had to take the decision in the interest of the team and the club. We had exactly the same situation five days ago at Villa Park, being 2-0 up with 15 minutes to play and we didn't want to make the same mistake again’.
“I decided to switch to a back five with Harry Maguire and bring on Marcus (Rashford) as another fast winger on the right hand side. I think it was the right decision.
“Cristiano was not happy. He is a goalscorer. He would have wished to stay on and maybe score a goal himself but for us it was more important to be compact, to make sure that we have enough legs and also strong headers to defend their set pieces.
“When we had scored the third goal, I said exactly that to him. I said, ‘Look, Cristiano, I understand you are still ambitious, you want to score yourself but maybe in a couple of years when you’re a head coach yourself, you will hopefully make the same decision and be in the same role I was in today after 75 minutes’.”
Rangnick also clarified that he has “no issues” with the Portugal international.
He added: “I didn't expect him to hug me after being substituted. I know how goalscoring players think and I had to make this decision. I have no issues with Cristiano. He was coming back from injury and hadn't played for one-and-a-half weeks. We had the likes of Rashford and
Anthony Martial on the bench so why not use it? I would make the same decision again.”
The 36-year-old did not play in Saturday’s 2-2 draw with Aston Villa due to a hip flexor injury, the only time he has not started a
Premier League game under Rangnick.
The head coach said: “I've been here now for six weeks and I've never had an issue with Cristiano. We had a discussion before the Villa cup game about his injury and we agreed not to use him.
“He was available again today and we decided to play him from the start. The most important thing is that we win games and this comes first.”