Nikolai Valuev vs. Ruslan Chagaev was a professional boxing match contested on 14 April 2007, for the WBA heavyweight championship.

[2][3][4][5] Ruslan Chagaev had become Valuev's mandatory challenger following his split decision victory over former champion Ruiz in November 2006.

Timm also had a Panasonic TV with a 2.5 m diagonal installed so they could study Valuev's style in full size.

"[10] Shortly afterwards Chagaev signed to face WBO champion Sultan Ibragimov in a unification showdown that would take place in Moscow in October 2007.

However, on 31 July, it was officially announced that the fight had been cancelled due to Chagaev suffering from an aggravation of gastric problems.