HITC Sport understands personal terms were agreed last week.
Alvaro Negredo celebrates after scoring for Manchester City
Middlesbrough are ready to confirm the signing of Spanish international striker Alvaro Negredo, HITC Sport understands.
The 30-year-old was one of half-a-dozen front-men being looked at by Boro's hierarchy - led by Spanish transfer negotiator Victor Orta, who is playing an increasingly influential role in the club's signings.
He has now helped negotiate a season-long loan for Negredo, after already agreeing to his personal terms last week, with the former Manchester City man happy to turn down potentially more lucrative deals in China to move back to England.
Boro will take Negredo on an initial season-long loan, which will cost them around £2million and they will then be in line to make the the deal permanent next summer.
Middlesbrough boss Aitor Karanka has made it clear to his bosses that he needed more strike power in the top-flight, despite the club having spent nearly £15million combined on David Nugent and Jordan Rhodes in the last 12-months - and now Negredo looks to be the man who will lead their challenge in the Premier League.
A source told HITC Sport that the deal is almost done and could be confirmed as early as Monday evening.
Valencia have also offered Middlesbrough the services of right-back Antonio Barragan and they have indicated favourably about a possible deal as they were looking for cover in that area.
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29-year-old Barragan has already spent time in England with Liverpool at the start of his career and would have no qualms about making the move to England.
Despite only being half-way through July, Boro have already completed deals for Viktor Fischer, Bernardo Espinosa, Marten de Roon, Jordan McGhee and Victor Valdes and they are also waiting on a permit for Gaston Ramirez.
A bid has also been lodged for Borussia Dortmund's Nevan Subotic, although Boro face substantial competition for his signature.