And Arteta wants there to be healthy competition in his goalkeeping stocks.
"That's what I said to them and I said to the goalkeepers in the last two or three years - that we don't want to do that," he said.
"What we want to do is empower performance and ask them to train behave and play the best possible way. How can I guarantee somebody something?
"It wouldn't make sense with what we are demanding them to do. So it is on a daily basis, what you did three months ago in football, it doesn't count. So is what you're going to do today and tomorrow, and that's it."
Asked about reports in Germany which claimed Arteta had promised Leno he would start against Tottenham, Arteta replied: "I don't know where they are coming from but they are ahead of me! '
"I think I am the one who picks the team at the weekend and sometimes I read things that I haven't decided yet.
"They give me ideas at the most, but nothing else because I haven't made a decision for Saturday — so imagine [if I had] for the north London derby."
Need a VPN? Or seeking to switch? Then support Tribal Football by clicking here to sign up with our official partners NordVPN. Not only will you receive the best VPN experience, but also great discounts by signing up via Tribal Football. Thanks for your support!