Neutral fans on Twitter express their disbelief after Middlesbrough confirm signing of Alvaro Negredo

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Boro have brought the former Manchester City striker to the Riverside on a season-long loan from Valencia.

Alvaro Negredo celebrates after scoring the third goal for Manchester City

Middlesbrough have continued their summer of ambition by signing former Manchester City striker Alvaro Negredo on a season-long loan deal for Valencia.

Boro have already brought in ex-Barcelona and Spain goalkeeper Victor Valdes, Ajax star Viktor Fischer, Valencia defender Antonio Barragan, and last season's loanee Gaston Ramirez amongst their signings so far in the transfer window.

Now, they have added Barragan's teammate Negredo for the season in a bid to boost a strikeforce which already boasts Jordan Rhodes, Cristhian Stuani, and David Nugent.

The 30-year-old is best remembered by English supporters for his solitary season with Manchester City in 2013-14, when he scored 23 goals in all competitions largely in the first half of the campaign.

Alvaro Negredo celebrates after scoring the second goal for Manchester City

However, injury cut short that lethal form and he failed to score for the Premier League side after the third week of January.

He has struggled to recapture his previous form in two years at Valencia since that season, netting just 10 times for the La Liga side.

Regardless of his recent struggles, however, Negredo represents another hugely ambitious coup for Aitor Karanka's promoted Boro, and fans of other clubs on Twitter could scarcely hide their disbelief after the deal was announced.

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