Newcastle United midfielder Emre believes he can produce his best under manager Kevin Keegan.
The Turkey international told Newcastle's website: "I was becoming frustrated this season because, although Sam Allardyce said nice things about me, I wasn't playing.
"I wasn't playing regularly and I couldn't show my best when I was playing one game and then going back on the bench. I was happy with Sam sometimes, I believe he's a good man, but I need to play more to find the consistency he wanted. I hardly played in three months.
"He had other options in midfield and he preferred to pick them. I accepted it because I was a professional, but it was hard. I never wanted to leave Newcastle because I'm happy, I like the people here, I just wanted to play more.
"I'm very happy with the new manager and the dressing room is very happy. Everybody believes in Kevin Keegan and we look forward to playing for him. We know he is a big legend for everyone in English football, but especially in Newcastle.
"The first time I saw his face I could understand everything people said about him. The first time I talked to him, I knew he was a manager I would like playing for. He's spoken with every player and he has given us all belief, but we need to start winning games again to show that.
"The players have to believe in the manager and they do believe in Kevin Keegan. If you believe in the manager you can do your best, that is certainly how it is with me. We believe he is a really honest man and I think everything will be okay for Kevin Keegan and Newcastle United.
"When I feel confident I can show my best. Kevin Keegan came to see me play for Inter Milan when he was at Manchester City and he has told me this. I know he wanted me then and that's important for me. That was four years ago, but we are together now.
"I have to show him my quality, but I know he believes in me and that's important. The manager believes in all the players and we have to justify that now. That is the challenge for us."