Derek Chisora was left with mixed emotions after he suffered defeat in his final bout, but only after an exhilarating fight of the year contender with Deontay Wilder at a raucous O2 Arena.In the 50th bout of Chisora’s (36-14, 23KOs) eventful professional career, ‘Del Boy’ showed remarkable powers of recovery to come back from a punishing eighth round and take former WBC champion Wilder (45-4-1, 43 KOs) to the distance.After the American showed the power early on in London which once made him one of the most formidable punchers in heavyweight history, Chisora’s farewell threatened to turn into a nightmare during a one-sided start.