Derek McInnes today warned Rangers that Kenny McLean is not for sale.
Aberdeen have rejected a £300,000 bid from Ibrox for the Scotland international.
McInnes insists no Dons star is for sale this summer as he focuses on strengthening his squad.
He said: “There was a bid submitted but it was rejected as we said we would do before the bid was made.
“Enough players have left here and we want to concentrate on getting players in rather than players leaving.
“Part of the assurances when we talked (about McInnes rejecting a move to Sunderland) was about trying to maintain this squad.”
McLean, a £275,000 signing from St Mirren in winter 2015, is contracted to Pittodrie for another year.
McInnes views him as an integral part of his squad for the season.
McInnes said: “Kenny is under contract here and he’s more than comfortable with it.
“We are looking forward to the season with Kenny in our team.”
Aberdeen have already lost two key players to the Old Firm this summer. Jonny Hayes, who had two years left on his Dons deal, transferred to Celtic for £1.3 million.
Ryan Jack joined Rangers as his Dons deal had expired and he rejected a new contract at Pittodrie.
With a hands-off warning issued to Rangers over star midfielder McLean, the transfer fee secured from the Hayes move to Parkhead will be used to bolster the squad.
McInnes said: “Any money we have available from the sale of Jonny or with the budget that we have, it is important that we not only try to bring good players to the club but we try to re-sign and keep our better players.”
McInnes secured his third summer signing with Birmingham City striker Greg Stewart, 27, arriving on a season-long loan deal.
Midfielder Greg Tansey previously signed a three-year deal from Inverness and Celtic attacker Ryan Christie has been secured on a season-long loan.
The Dons remain hopeful of securing Scotland international Shaun Maloney.
Hull City looked set to retain Maloney on a one-year contract extension but the Reds have pitched in with a two-year contract to offer more stability.
McInnes said: “I would like to bring in more signings in before the Euro deadline (Friday July 7 at midnight).
“It is not easy getting good players but we will certainly try.”
McInnes previously tried to secure Stewart from Dundee last summer but lost out to Birmingham, who signed him on a £500,000 deal.
McInnes said: “I’m delighted to get Greg Stewart on board.
“When you look at his stats from his time at Dundee he brought a lot of goals and assists.
“Hopefully, he can do the same with us.”
Meanwhile, McInnes has confirmed Danny Rogers will fight it out with Joe Lewis for the No1 keeper’s position.
Rogers has spent the last two years on loan at Falkirk .
He said: “We have recalled Danny to work with Joe and they will be competing for the first team.”
Rising teenage midfielder Terry Taylor, 16, looks set to join Wolves. Taylor made his U20 debut at just 14 last year.
Wolves will have to pay training compensation in excess of £100,000.
McInnes said: “Terry Taylor has indicated he would like to take the option to move to Wolves but there would be a fee.”