Mexican boxer Victor Burgos, 32, remains in a coma on Tuesday, four days after an operation to remove a blood clot from his brain caused by a Saturday fight in the city of Carlson, in the United States state of California.

Burgos was beaten by Armenian boxer Vic Darchinyan, when after a minute and a half of the 12th round, the referee declared a technical knockout. He had been campaigning for the world International Boxing Federation title.

Burgos, who was born in the Mexican state of Puebla, has been living in Baja California Norte city of Tijuana, which borders the United States. Doctors at the University of California Medical Center, where Burgos is lying, have not given any news on his condition.

Burgos, known as El Acorazado (Ironclad), was the world champion of the World Boxing Federation, after beating fellow flyweight in the US city of Las Vegas in 2003. His record is 39 wins, 15 draws and two loses; and 23 of his wins have been knockouts.

Darchinyan's has won 28 times, 22 of those via a knockout.

(Xinhua News Agency March 7, 2007)