Barcelona and Spain star Xavi will return early from his vacation to feature in the international friendly against Mexico.
The World Cup winner jokingly admitted his team-mates may have put on some weight since they last played together in South Africa.
"We will play because the coach is telling us to," Xavi said to AS. "We will do what he asks.
"It is normal for us to be out of shape a little because of our inactivity..."
Gerard Pique echoed Xavi's comments that the Furia Roja might have to shake off a bit of rust.
"The downtime will be noticeable," Pique stated. "But we are under the instruction of the coach and he knows what we need to do."