(CNN) -- WBA world heavyweight champion David Haye has branded his IBF, WBO and IBO counterpart Wladimir Klitschko a "robot" and said the Ukrainian will "malfunction" in their unification bout in Hamburg on Saturday. Haye, 30, was talking at the final press conference ahead of the duo's highly-anticipated face-off, with tensions clearly running high between the two fighters. "It's going to be fun to watch this big robot start malfunctioning," the London native told reporters. The pair were due to get in the ring in 2009, before Haye was forced to withdraw with a back injury, and the Englishman said he is happy the fight did not take place two years ago because he is now in much better shape.
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David Haye has branded Wladimir Klitschko a "robot" ahead of their fight on Saturday
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Haye said it will be fun to watch the Ukrainian "malfunction" in Hamburg
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Klitschko said Haye will be the 50th knockout of his professional career
Former world amateur championships silver medallist Haye has previously said he will retire before turning 31 in October, but "@placeholder" has also expressed a desire to defeat both Klitschko brothers before hanging up his gloves.