Robert McCracken admits Carl Froch's camp have been left with a "sour taste" in their mouths after their fighter was booed out of the ring following his victory over George Groves.
'The Cobra' retained his WBA and IBF super-middleweight titles with a somewhat controversial ninth-round stoppage of his fellow Englishman in Manchester.
Referee Howard Foster stepped in to call off the bout with Groves having come under attack. Many have since suggested the official made the call too early, particularly with the challenger having been ahead on all three scorecards.
Speaking to Sky Sports' Ringside show, McCracken expressed his disappointment at the reaction of the crowd following the result, with some of the paying public expressing their opinions loudly as Froch made his exit.
"I think first and foremost it left a sour taste in our mouths Saturday night," Froch's trainer said.
"There were highly-experienced people in the sport that are clearly of the opinion that the stoppage was right. I've heard he (George) was rolling punches and waiting for Carl to wear himself out. He was bang in trouble, no doubt about that.
"To stage a comeback like Carl did, albeit that the referee jumped in two or three seconds early, and to get booed out of the ring is a really poor show.
"We are kind of stewing from that. It was very disappointing considering all that he's achieved in his career, all the fighters that he has beaten and also the memorable comeback he had on Saturday."
McCracken also dismissed any suggestions that Froch had taken Groves lightly in the build-up, stating they always knew 'Saint George' possessed serious power.
"We never underestimated George Groves; he is a very talented boxer and he has real power," he said. "There's no doubt about it - he's a good fighter.
"Carl did the training and did the work. You have to put your heart and soul into every fight and he's had a lot of world championship fights.
"In fairness I don't think it's humanely possible to put your heart and soul into every one, but for sure he prepared for George Groves."
Froch had to climb off the canvas to keep his belts, though his corner were confident he had fully recovered from the shock opening-round knockdown from a Groves right hand, adding: "I'm not going to say he was fine, because he was hurt.
"But he had recovered five seconds after sitting on the stool. He's an extremely fit and well-conditioned athlete.
"He was caught with a really good shot but was well recovered before the minute had ended and went out into round two with us thinking he could eke his way back into the fight. The plan was to try and stay out of the way and box his way through the next couple of rounds, which we feel he did."