Middlesbrough manager Tony Mowbray is playing a waiting game concerning defender David Wheater's availability to face Bristol City.
The proposed deal is believed to be worth over £2million and the 23-year-old was left out of the Middlesbrough side for Saturday's FA Cup defeat by Burton.
While Mowbray confirmed things were happening behind the scenes about a possible transfer, he believed Wheater may still be available to play against Bristol City on Saturday.
The Boro boss said: "Things are happening.
"It (his absence against Burton) wasn't about avoiding him being cup-tied, he wasn't available due to things that might be happening behind the scenes.
"Having said that, if another club wants to buy him lots of things have to be agreed first with the player and the two clubs, so he may yet be playing for us next Saturday.
"It might become more evident over the next few days."