Speaking to Stadium Astro, Bruce said: "The body language of some of the players doesn’t look right. We’ve been talking now and the first one you look at is why all of a sudden Marcus Rashford, after how good he was, how good he played for England a few weeks ago, [has gone] to what you see now. Is he not happy playing on the right, what is wrong? We aren’t going to know what has happened behind the scenes if anything has happened.
"When he comes off, he shows that petulance, he is not happy. I think he needs to have a look at himself, to start with. It’s not just him, you look through the nucleus of the side and they have been blown away by Newcastle. That is the worry."