Well it's interesting to know, because my best player is in a big slump right now for the last 6 games. And despite training him and making him play more then 48 minutes per week, he is not improving any of his skills!
Yet, this guy could be sold over $1million. So I would be glad to see him improve in 3 different categories in a single week, cause I pay him too much (9000$) for what he brings to the team right now...