Wenger said Ramsey “should be back after the international break”, ruling him out of league matches at Leicester on Saturday and Watford on 27 August and making him doubtful for Wales’ opening World Cup qualifier with Moldova on 5 September.
The 66-year-old Frenchman, who has been in charge of the Gunners since October 1996, urged the fans to trust his judgement and said he had completed over 400 transfers during his time at Arsenal.
“It is dangerous. English clubs suffocate themselves by buying players at a high price with high wages, if it goes wrong you are left with players with high wages,” he said.
“The identity of the buyer multiplies transfers by two or three or even 10 times more.”