Answer
The answer is Wladimir Klitschko. Samuel Peter, a renowned Nigerian boxer, famously faced Wladimir Klitschko in two significant boxing matches. Their first encounter occurred in 2005, where Klitschko successfully defended his heavyweight titles against Peter. The second bout took place in 2008, with Klitschko once again securing a victory and retaining his heavyweight titles. Both matchups between Peter and Wladimir Klitschko were captivating events in the boxing world.