Arsenal boss Arsene Wenger admits Ryo Miyaichi's fitness is a concern in preseason.

The Japan international is struggling with an ankle injury.

Wenger said after their draw against Kitchee FC: "He had an ankle problem and we were not sure to play him. We did not play him against Manchester City because he is not 100 per cent at the moment, physically. I think you could see that he is not at his best at the moment. I think he needs two or three more weeks work to come back to his best."