YOUR VIEWS ON COLBACK.
User @_davidhill said: "#SAFC have lost a top player in Jack Colback. Welcome to the best team in the North East, #nufc #baller".
Ashley Nixon posted: "Jack Colback is a rather good signing. Under the right tutorage [sic], he could develop into something that England currently do not have."
@MacauleySmith_ tweeted: "Jack Colback is better than Dan Gosling..Still not a replacement for Cabaye though. Sort it out #NUFC".
Sunderland fans also weighed in. Connor Tighe posted: "Not bothered one bit about Jack Colback, step up @ JordiGomez14" and Ben Turner-Kennedy said: "What is Jack Colback doing!! No loyalty left."
And @ItsKieboy said: "Gutted to see Jack Colback leave Sunderland but class to see someone get a move to their boyhood club. @SAFCOFFICIAL".