"I'm always honest and I say my door and the door in the team is always open but it's about performing," he said.
"We have always this agreement: work hard, don't talk too much, win games. If a player doesn't want to be happy I can't keep him happy, but if he wants to be happy it's quite easy for me to keep him happy.
"Being happy only when you make 48 games, it's difficult for each player. To feel you are important for the team, that's 100 per cent true for each player in the squad. I think it's not too difficult to be happy in our team."
