Manchester United have set a fresh asking price for Antony amid interest from Atletico Madrid, according to Fichajes.
The Brazil international joined Real Betis on loan during the last transfer window. He has impressed for them with four goals and four assists in 12 appearances.
United are prepared to cash in when Antony returns this summer and reports claim that they could demand around £40 million to sanction his departure.
The Red Devils were previously aiming for £30m from his sale, but their valuation has been hiked amid Antony's exceptional form with Betis on loan.
Atletico are reportedly one of the player's suitors and United appear confident of recouping at least £40m from his transfer at the end of the campaign.
United are expected to sign a right wing-back with the funds recouped. They have been linked with a move for Bayer Leverkusen star Jeremie Frimpong.
Frimpong, who has managed 15 goal contributions for the German champions, has a release clause worth £34m in his existing deal.