Schalke boss Felix Magath has confirmed Germany defender Heiko Westermann is set to join Hamburg.
Westermann, 26, travelled to Hamburg on Monday evening after the clubs agreed a fee, believed to be in the region of £6.5 million.
"Heiko has quit our training camp as he is on his way to Hamburg," Magath told Deutsche Presseagentur. "The paperwork is still missing the signatures, but I expect this will go through in time.
"I was very much unwilling to accept his transfer, looking at things from the viewpoint of a manager. In the end I have agreed to this transfer due to the overall situation of our club. I was unable to guarantee him first-team football as he was wanting to play in the centre of defence, which is his ideal position."