You're reading: In Hamburg, it’s David Haye vs. Klitschko x 2

He's only fighting one of them, but outside of the ring it's David Haye vs. both Klitschko brothers.

The trash-talking Englishman faces 35-year-old Wladimir Klitschko on Saturday in a heavyweight superfight with four titles at stake.

If Haye wins, there’s a narrow chance he could line up one last fight with Wladimir’s older brother, Vitali, before retiring from boxing by the time of his 31st birthday on Oct. 13.

Asked about the prospects of fighting Haye, Vitali Klitschko says: "He’s not retiring on Oct. 13. Wladimir will send him into retirement."

Saturday’s unification fight in Hamburg is widely seen as the most high-profile heavyweight battle since Vitali Klitschko lost to Lennox Lewis in 2003.