There is that, but there is also the fact there is a time and place to show your frustration. This can be done away from the cameras behind close doors etc, and this doesn't just apply to Mata, but to every player. I never understand why players show petulance when they are subbed from the field, after all they maybe human and have feeling but they also have a level of professionalism to show, both as a player and role model. Jose said his door is always open for people to speak with him, this is the route Mata should of taken, now the Jose heckles are up and Mata has a choice. If my boss grills me at work I don't show petulance or annoyance I simply take it on the chin or debate back in a reasonable and rational way. We live in a media driven world which you would make them think twice about doing what they do no matter what the circumstances. He's a professional who want's to play football, that has to be remembered here and for the good of both parties the right agreement must be reached whether we part or stay company. I can see both points of view but Mata should of gone about this the right way, the way he did was the wrong way.