Arsenal boss Arsene Wenger says he faces a difficult summer over his transfer plans.

Players such as Lukas Podolski, Yaya Sanogo and Joel Campbell are all set to return for pre-season training from loan spells, and Wenger admits he has a balancing act to perform.

"The squad is the right number but the competition is right, not too big because too big kills competition, too short kills competition as well, so we have to find the right number that is a fair competition," the Frenchman said.

Asked if players had to go out before others could come in, Wenger added: "Chronologically you do not always decide that. Sometimes you have to decide 'okay, we have an opportunity, we do it and after we will see how we deal with the rest'."