The Ghana midfielder, 31, comes off contract at the end of the season.
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Ahead of tomorrow's trip to Newcastle, Arteta said: " We need it from Thomas to be at the level we want him to be.
"He's working so hard to do what he is doing at the moment, I think he is playing really well, in different positions and with different demands and he is coping with it in a great way. He's a big player for us.
"I love what you said. He's ONLY 31! He's in a really good place and we will have these discussions."
