India's M C Mary Kom (46kg) re-asserted her status as the world's most successful woman boxer, clinching an unprecedented fourth successive gold medal, but India failed to retain the team crown at the fifth AIBA World Championships in Ningbo City, China, on Saturday.

In a repeat of the previous World Championships final in New Delhi [Images], the 25-year-old Indian out-punched Romania's Steluta Duta for a 7-1 verdict to grab India's only gold medal at the event.

The other Indian finalist, N Usha (57kg), had to be content with a silver for the second successive time after losing 1-6 to Chinese Qin Jian.

The defending champions, who went to the championships with a seven-member contingent, thus finished the tournament with a haul of one gold, a silver and two bronze medals � through Chhoto Laura (50kg) and L Sarita Devi (52kg), who lost in the semi-finals on Friday.

Though she couldn't ensure that the team retained the overall title, Mary Kom was again India's star of the show.

The Manipuri boxer remained away from the ring for two years to take care of her twin babies after completing a hat-trick of World Championship golds in New Delhi.

The pint-sized pugilist returned to don the gloves this year at the Asian Championships, in September, where she failed to retain her gold, settling for a silver medal.

She claimed the National title earlier this month before leaving for the World Championship.