Nicola Adams stands one more win away from securing a London 2012 qualifying berth at the Women's World Championships in Qinhuangdao, China - but must beat a five-time world champion to get it.
Adams eased past Karlha Magliocco of Venezuela with a 20-7 win in the flyweight division, while team-mates Natasha Jonas and Savannah Marshall also kept alive their Olympic dreams.
Adams, twice a World Championship silver medallist, must now face Indian superstar Mary Kom in the quarter-finals on Thursday. If Adams wins, she will be guaranteed an Olympic place.
Kom won consecutive world titles between 2002 and 2010, albeit all in the light-flyweight division. Kom only moved up to 51kg when the three inaugural women's Olympic weights were determined late in 2010.
Liverpool lightweight Jonas is likely to have to win two more bouts to confirm Olympic qualification after she reached the quarter-finals with a hard-fought 25-22 victory over India's Laishram Devi.
And Hartlepool's Marshall continued her superb form at middleweight, cruising home 13-3 against Norway's former European champion Lotte Lien. Like Jonas, Marshall is likely to need to win two more fights to make sure.