Arsenal midfielder Mesut Ozil says his side "need reinforcements" this summer in order to battle for the biggest trophies next season. 

Speaking to Welt am Sonntag, he pointed to Pep Guardiola's appointment as Manchester City manager as an example of the challenges Arsenal face next season.

"We know that it will not be easy and that we need reinforcements if we want next season to be on top here again. It is again interesting to see who invests in who and how much the clubs do during the summer break," he said.

"In addition, great coaches are coming into the league. I am thinking primarily of Pep Guardiola. Wherever he has been, he had success. He is a coach, keen on playing and his teams are feared. I wonder what he will do with Man City. He will be imprinting his football in England and people will be surprised."