Celtic have already completed a deal on a potential Kieran Tierney replacement.
While the Scottish giants have not agreed a deal to sell the much wanted Scottish left back, they have already secured a player who could replace him.
Boli Bolingoli-Mbombo has signed for Celtic from Rapid Vienna.
The 24-year-old defender comes for a fee that could rise to 3 million.
Arsenal and Napoli are chasing Tierney, but no club has put in a bid that comes close to Celtic's valuation on the player.
Bolingoli-Mbombo may have to complete with Tierney for a first team place if the latter ends up staying.
But most experts believe that Tireney will be sold before the close of the summer window.
