Cash-rich Southampton are leading the charge for Fraser Forster and Virgil van Dijk, with the keeper expected to fetch around £8million.
The south coast side have serious competition for van Dijk, with Sunderland and Swansea also hovering in the wings -which could spark a bidding war for the Dutchman.
The pressure has been turned up on the Hoops as a result of suffering a double whammy in Poland last night when they lost 4-1 to Legia Warsaw - and Efe Ambrose to a red card.
The result leaves the Hoops' Champions League aspirations in tatters ahead of the return game in Edinburgh next week - for which the Nigerian defender will be suspended.
Manager Ronny Deila had admitted he needs to get through to the Group Stage to be in a position to bring the quality additions he wants to make to his team.
But Champions League qualification now seems a forlorn hope after the drubbing in Warsaw.
And without the £20million cheque it brings, the manager will find it tough just to hang on to the stars he already has.