According to this Klit/Povetkin article, Haye is still eyeing Harrison for 11/13

[Boxing Scene]

Klitschko-Povetkin Update

By Alexey “Oscar” Potapov

Looks like IBF/WBO/IBF heavyweight champion Wladimir Klitschko (54-3, 28 KOs) could fight IBF mandatory challenger Alexander Povetkin (19-0, 14 KOs) on either September 11 or 18th at Commerzbank Arena in Frankfurt, Germany. Team Povetkin is interested in staging the fight in Moscow. Wladimir was seeking a unification fight with WBA heavyweight champion David Haye (24-1, 22 KOs), but it appears David is eyeing a fight with Audley Harrison (27-4, 20 KOs), which could take place on November 13th in England.