Hamann appeared to strike a nerve with Liverpool fans on Twitter after suggesting the club "missed a trick" by not signing Nemanja Matic.
The Champions League winner took to social media shortly after Manchester United had completed a £40million move for the former Chelsea midfielder.
"Matic to United is a mighty coup for [Jose] Mourinho's men," wrote Hamann. "I think LFC missed a trick, type of player we badly need. Fee looks reasonable too."
But while the German meant well with his remark - well, he clearly has the best interests of the club at heart - it went down like a lead balloon.
One Reds supporters claimed Matic wouldn't add anything to Liverpool, given the way in which the team play under Jurgen Klopp.
While others suggested the Serbian is a little too old for the huge money (£40million) Manchester United were happy to part with to sign him.
Matic to United is a mighty coup for Mourinhos men.I think LFC missed a trick, type of player we badly need. Fee looks reasonable too

Totally disagree the way we bomb forward he wouldn't cover quick enough need legs of a kante mascharano type player








The Serbian joined Man United for £40million