Having arrived an hour later than the champion to the venue because of Manchester traffic, Dubois made a brisk, business-like ringwalk.
Wardley, in his first appearance since being upgraded to world champion, soaked in the atmosphere with a leisurely entrance. Draped in an Ipswich Town Football Club robe, he was greeted by a warm reception from the 18,000-strong crowd.
With a combined record of 42 wins – 40 coming by knockout – there was palpable anticipation inside the arena, and Wardley stayed true to his promise to bring the action early as Dubois immediately hit the canvas after a flush right hand.
Dubois winked to his corner but looked shell-shocked. He wrestled Wardley to the ground as both fighters swung for the hills.
Many expected Dubois to impose himself early before Wardley could settle. Considered the better technical boxer, he regrouped and landed a right in the second.
Momentum swung again in the third when Wardley, who looked sharp with his overhand right and uppercuts, sent Dubois wobbling. Dubois took a knee and survived the count before firing back with a right hand that rocked Wardley.
The fighters and fans struggled to catch a breath as trainer Don Charles urged Dubois to lean on his jab, and he followed that instruction to take control of proceedings.
Dubois’ left eye was swollen, but Wardley’s face looked a mess as Dubois set up his attacks with a left jab before landing his biggest shots in the fourth and the sixth.
Wardley, who was working in recruitment a decade ago, showed an extraordinary chin and heart as he refused to go down despite his legs trembling and blood pouring down his face.
Most would likely have been withdrawn by their corner, but Wardley has built a reputation on dramatic comebacks. This time, however, it felt different.
The doctor inspected Wardley’s injuries before the eighth round and allowed him to continue.
By the ninth, the referee looked ready to intervene as Wardley continued to absorb heavy punishment and the contest became increasingly difficult to watch.
Doctors again allowed Wardley to continue before the 10th and when the stoppage finally arrived in the 11th, there was almost a sense of relief.
A sensational fight had reached its conclusion.
Warren – a veteran of 45 years in the sport – described it as “the best heavyweight fight” he has ever promoted.