But the 19-year-old is yet to sign the new deal.
The Spaniards current deal is set to expire at the end of the season and Atletico Madrid have expressed their interest in the youngster.
“He has an offer which he has agreed, but has not signed yet,” said Wenger.
“Some clubs are doing their work behind our back to destabilise him. We cannot stop that, but it is a fact.”
