ace purecontrol green Paperwork is still to be completed but 30-year-old former Manchester City forward Negredo has already linked up with Boro at their pre-season training camp in Marbella.
cr7 superfly blue The promoted Teessiders were also poised to sign Serbian centre-back Subotic from Dortmund, until the Bundesliga club announced he had failed a medical.
"Bad news for Neven Subotic," a BVB statement read. "The investigation of a specialist in England has shown that the Borussia Dortmund player must undergo surgery in the rib area. It is expected that Subotic will be out for the rest of the year."
MagistaX Proximo black The former Serbia international won the league with Dortmund in both 2011 and 2012.
Negredo, meanwhile, was a member of the City side which won the Premier League title in 2014.
Magista Obra FG orange The Spain international impressed at the Etihad Stadium, scoring 23 goals in 49 appearances in what proved his only season at the club after a £16.4million move from Sevilla in 2013.
superfly mercurial v orange He returned to Spain with Valencia in the summer of 2014, initially on loan before a £19million permanent deal was agreed last year.
He boasts 112 goals from 264 appearances in LaLiga and was also a member of Spain's victorious Euro 2012 squad.
It has been a busy summer for Boro manager Aitor Karanka with Antonio Barragan, Victor Valdes, Viktor Fischer, Bernardo Espinosa, Marten de Roon and Jordan McGhee already on board at the Riverside Stadium.
