They are willing to pay the £18m release clause in his Boro contract, having joined them for £4.5m from Aston Villa in 2016.
Huddersfield Town are closing in on £10m-rated Club Brugge’s Belgian winger Anthony Limbombe, 24.
Scunthorpe United left-back Conor Townsend, who began his career with Hull City, is wanted back at the Tigers.
Nigel Adkins also hopes to launch fresh bids for Brighton duo Oliver Norwood and Jiri Skalak and the Tigers chief is also interested in Manchester City’s Brandon Barker.
Bolton Wanderers and Sunderland are battling to sign Bradford City striker Charlie Wyke, 25, for around £750,000.
Wigan Athletic,Preston North End and Peterborough have also been linked with the forward.
Rotherham United hope midfield player Ryan Yates will be allowed to join them on loan after Nottingham Forest’s capture of Jack Colback.
Millers chief Paul Warne also hopes another midfielder, Richie Towell, can return on loan from Brighton.
Peterborough United says Sheffield Wednesday want 25-year-old transfer-listed defender Jack Baldwin - along with Sunderland.
Trialist and former Ipswich and Bradford striker Paul Taylor, 30, hopes to seal a permanent deal at Doncaster Rovers after recovering from a groin problem.
Taylor played under Rovers chief Grant McCann at Peterborough United.