Fletcher arrived for talks on Thursday after flying in from West Ham's training camp in Germany and put pen to paper on a four-year deal on Friday morning.

Signed for £6.5m, Fletcher adds to the fire-power assembled at the Riverside over the last few weeks as Garry Monk shapes his squad for the Championship season and is the second player to sign from West Ham in the last seven days, following on from the acquisition of Ireland international goalkeeper Darren Randolph.

So far this summer we have signed Britt Assombalonga, Martin Braithwaite, Cyrus Christie, Jonny Howson and Darren Randolph, plus Luke Armstrong, Enes Mahmutovic, George Miller and Lewis Wing at Under-23 level and Connor Roberts on loan for the season from Swansea.