Louis van Gaal is considering a sale of Robin van Persie this summer.
Van Persie's contract at Manchester United expires in 2016 and he wants to remain at the club with a new contract.
Van Persie turns 32 in August and is hoping to sign a one-year extension.
Since United's title-winning season in 12-13, Van Persie has struggled with his form and with injuries.
United's signing of Memphis Depay has increased competition for places in Van Persie's attack.