David Haye will retire for second time if fight with Vitali Klitschko does not get the go ahead I have covered Haye's career from small hall shows to his poor showing in Hamburg against the younger of the Klitschko brothers, and the issue for him late in his career is that he has been judged on that performance, and against Audley Harrison, which was a huge mismatch. Those were the two most watched fights of his career, and it skewed the way Haye has been judged by sports fans who do not follow boxing closely. Haye has also handled his PR poorly at times. Fans are fickle, and message boards on the internet forums and social networking sites are often harsh, and unsubstantiated. Haye was a fine, and decorated cruiserweight world champion, and I have always held the belief that whatever he was to achieve at heavyweight should always be seen as a bonus. Given his size, he is not a natural heavyweight contender, in an era which has been dominated by the two superheavyweight brothers. Yes, it is a poor time in terms of depth in the heavyweight division, but Haye cannot be blamed for that. "If a fight with Vitali happens down the line, fantastic," Haye told BBC Sport. If it doesn't then I've been undisputed cruiserweight champion of the world and a heavyweight champion of the world. I've achieved more than I anticipated I would do as a youngster. I'm happy with what I've done in the ring and it's nice to finish on such a high. When I retired after losing to Wladimir a year ago, it left a bitter taste in my mouth. But this time round after fighting in London in front of 30,000 of my fans, it really did put a smile on my face. If that's my last fight, it's one I'm very proud and happy of. However, Vitali's manager Bernd Boente declared yesterday that the 40-year-old is unlikely to face Haye because he hopes to launch his political career in Ukraine in October. Yet Boente left the door ajar, refusing to dismiss outright the possibility of Vitali wanting a farewell fight. It would be a major event, potentially in Ukraine, in a football stadium. If Klitschko were by then a fighting politician, with Haye looking for a giant-killing in that country, it would generate interest around the world. There is the sense that Klitschko, in his mind, still has unfinished business with Haye. Frank Warren stated at Upton Park on Saturday that a super-fight between Haye and Vitali could even be staged at Wembley such would be the interest. The promoter believes Haye would triumph - if he carried the fight to the older Klitschko. It will happen, 100 per cent, unless Vitali retires. If Dereck had won he'd have fought Wladimir, if David won he was going to fight Vitali, Warren said. Now David against Vitali is a natural fight. I was impressed with David against Chisora and he's made me change my opinion of him. David fights a lot off his back foot and if you do that against big guys, it suits their game plan. But if you jump on them and get under that jab, the one thing they can't do is fight on the inside and deal with a high work rate. Vitali's an old guy now, he's 40 years of age, and Dereck's shown how he can be beaten. Haye also came out in support of Amir Khan, stopped in the fourth round by Danny Garcia in Las Vegas in the early hours of Sunday morning. In response to calls that Khan should consider retirement, Haye believes his fellow British boxer, and friend, can come back. Amir's only 25. He made a mistake, but he can rebuild and come back from this.: said Haye.