The Gunners' only deal this summer has been for French youngster Yaya Sanogo.
"One of our strengths is young people know we will give them a chance. But what we look for is their motivation to be successful," said Wenger.
"We are interested in the ones that last because that makes a successful sportsman. That doesn't necessarily mean successful sportsmen are happy people, but it means they are determined and they are ready to hurt themselves to be successful and that's the type we are looking for. The people that are very demanding with themselves and each other for a long time. That consistent motivation is applicable to football, business, anything you do in life."