Frazer Clarke has reacted angrily after he was stripped of a semi-final spot at the World Boxing Championships.

The British super-heavyweight won his bout with home fighter Maksim Babanin in Ekaterinburg, Russia, on a split decision but the Russian team appealed.

The final-round scoring was reviewed and the result was overturned, with Babanin now guaranteed a bronze medal.

"The best moment of my career and the worst happened within a few hours of each other," tweeted Clarke.

"It's out of my hands; I just turn up and compete. This has to go to people with more knowledge and understanding of the situation."

Clarke, 28, from Burton upon Trent, won gold for England at the Commonwealth Games in 2018 and was making his debut in the world event.

The technical delegate for the International Boxing Association (AIBA) disclosed in a written report that Clarke's win had been overturned because the Russian boxer landed more quality blows in the target area in the third and final round.

Under the competition rules there is no right of counter-appeal and the AIBA declined to explain its decision in greater detail.

GB Boxing, the body that oversees the sport at amateur level in the four home nations, said it was "absolutely devastated for Frazer that a decision has been made to overturn the result".

"To have both the result and the medal he deservedly achieved taken away from him in these circumstances is a cruel blow and an outcome that has left the whole team dismayed and bitterly disappointed," added a spokesperson.

"It is critical that the sport operates with complete openness, transparency and clarity and upholds the highest standards of governance. We are therefore very disappointed that our request for information relating to the decision-making process in this instance has been refused."

AIBA, which runs the World Championships, will not be in charge of boxing at the Olympics in Tokyo next year after it was suspended by the International Olympic Committee.

Despite Clarke's result, Britain still have three boxers in the semi-finals in Peter McGrail, Pat McCormack and Benjamin Whittaker. All their semi-finals are on Friday.