On 1 November, there were early talks that Peter would be fighting former world title challenger Kubrat Pulev in December in Sofia, Bulgaria. Pulev, ranked at number 2 with the IBF, recently defeated Derek Chisora via decision in May. A fight was confirmed five days later by Team Sauerland, officially announcing the fight between Peter and Pulev on 3 December in Bulgaria. This would be a stay busy fight for Pulev before his anticipated European title defense against Polish boxer Mariusz Wach. Pulev vacated his European title on 22 November. In front of 15,000 at the Arena Armeec, Pulev defeated Peter via fourth round corner retirement (RTD) to win the vacant WBA Inter-Continental heavyweight title. Peter was aggressive throughout but struggled with Pulev's jab. The fight was stopped after round three when Peter dislocated his right shoulder while throwing a big punch. He went back to the corner leaning towards the right side and the injury forced him to retire.