Meanwhile, Boro continue to plot their next move in the transfer market behind the scenes, as they look to add to the four players they've already landed this summer before the current window closes. In the meantime, here's all the latest transfer and gossip from the Championship.
1. Hornets stalwart close to Spanish exit
Watford midfielder Etienne Capoue looks set to join La Liga side Valencia, on a loan deal with an option-to-buy. The France international has made 170 appearances since joining the Hornets back in 2015. (Football Insider) Photo: Alex Broadway
2. Reds close in on Sarr
Liverpool are said to have reached an agreement with Watford for their star winger Ismaila Sarr, with a £32m fee likely to be enough to bring the ex-Rennes sensation to Anfield. (Sky Sports) Photo: Justin Setterfield
3. Barca cool Aaron interest
Norwich City star Max Aarons now looks unlikely to join Barcelona, with the Catalan giants opting to move for Ajax's Sergino Dest. Bayern Munich have also been linked with Aarons. (90min) Photo: Stephen Pond
4. Barnsley target turned down Championship offers
Barnsley-linked Scott Fraser, now of MK Dons, has revealed he was subject of strong Championship interest, but opted to join the League One side due to the alternatives not playing the right "style of football" (MK Citizen) Photo: Laurence Griffiths