The signing arrives just over 24 hours before the transfer window shuts. Boro fans will be hoping that there is another player or two coming in before 5pm on Thursday when it closes. But where is the priority? Click and scroll through to see which position and those of their league rivals.
21. Stoke City
A centre-back and a winger are needed to strengthen the Potters. Man United youngster Alex Tuanzebe has been linked, while Newcastle winger Jacob Murphy could be a target. Photo: Pakawich Damrongkiattisak
22. Swansea City
The capture of Sam Surridge from Bournemouth on loan has eased the need for striking reinforcements but they could add another forward before the window closes. Photo: Dan Mullan
23. West Bromwich Albion
A goal-getter is key for the Baggies and Dwight Gayle could yet return to the Hawthorns. Photo: Clive Mason
24. Wigan Athletic
The Latics are weak in the centre of the pitch with only three senior players and need a strong, physical presence. Photo: George Wood