Phil Jagielka and loan-signing Steven Pienaar have joined Everton so far this summer.
Arteta in the Daily Mail said: “It is going to be a long season and we definitely need new signings.
“If everyone is 100 per cent and stays fit then maybe we will be okay, but if we get two or three injuries, we are going to need more players.
“We have a great chance to move the club forward again, and hopefully we can have a good run in Europe and keep improving.
“We have a better squad than when we were last in Europe two years ago; more experienced and better prepared. But it really is small, and if we can bring in some more new faces, it will be more than welcome.”
