Middlesbrough chairman Steve Gibson believes the sale of Luke Young to Aston Villa represents sensible business and assured fans a replacement will be recruited imminently.
Right-back Young joined Villa last week only a year after moving to Boro from Charlton but Gibson maintains the deal was 'right' for the Teessiders in every respect.
Villa will pay £5.5million up front with a possible further £500,000 for the 29-year-old.
And Gibson told the club's website: 'The fans need to know that we will only do what's right for the football club in the short term, medium term and the long term.
'Selling a 29-year-old full-back for £6million a year after we bought him for £2.5million, and doing so in the knowledge that we will replace him, is right for the football club in the short term, medium term and the long term.
'We're already busy working on bringing in a replacement.'