One week before the start of the Premiership and Reading face Dutch side Feyenoord.
Tickets are still on general sale.
"The fact that a team like Feyenoord will come and play us is just a measure of what we've done in the last twelve months and the distance we've travelled," Steve Coppell told the official website.
"I hope we put up a really sharp display which becomes a good indicator of what's going to happen seven days after that. Middlesbrough on the 19th is our focus.
"We've got to be as equipped as we can be and as prepared as possible for the next nine months."