Here's a question. I have been wondering.....

If a player has a spell of poor scores in matches.....will he forever get similar scores or do you have examples of players who then mysteriously start getting 8's and 9's??
Does power training that kind of player help?
I always keep morale and health numbers high so this is not part of the problem and never play out of position etc
I have been tending to sell players when this happens but is that the only solution?