Four Great Britain boxers have the chance to become the first host nation fighters to guarantee their places in the London 2012 Olympics in the World Championships in Baku on Tuesday
Anthony Ogogo, Thomas Stalker, Fred Evans and Luke Campbell all head into last-16 bouts in their respective weight categories in the knowledge that one more victory will secure their tickets to the Games.
Meanwhile, flyweight rivals Khalid Yafai and Andrew Selby, heavyweight Simon Vallily and super-heavyweight Anthony Joshua can also move closer to London, although none will be assured of qualification after Tuesday's action.
Middleweight Ogogo produced the highlight of Monday's action with a stunning 12-11 win over top Russian Artem Chebotarev. Ogogo got the better of an explosive last three minutes after the pair started the final round level.
Ogogo said: "I'm elated to win the bout but I was always confident I would. I don't fear anyone. Although it's great to win today, it doesn't mean anything unless I follow it up with one more win. I've got the belief that I can do it."
Campbell also moved closer with a slick 17-7 win over Nicolae Andreiana. The Hull bantamweight said: "I expect to put on another good performance and make that place mine. I've been working for it all year and I won't let it slip away."
Middlesbrough heavyweight Vallily advanced to the last 16 with a walkover against Samir El Mais of Canada, but there was disappointment for London lightweight Martin Ward, who went down 21-20 to Robson Conceicao of Brazil.
Ireland will have six boxers battling for a guaranteed place at the London Games after John Joe Nevin, David Oliver Joyce and Darren O'Neill joined Joe Ward, Michael Conlan and Roy Sheehan in the last 16.
Former world bronze medallist Nevin skated past India's Akhil Kumar 21-14, Joyce pulled out a big 26-13 win over Mohammad Khaiber of Afghanistan and O'Neill nudged past Egypt's Mohamad Hikal 15-13.
But there was disappointment as Ireland's two Olympic medallists bowed out. Light-flyweight Paddy Barnes suffered a shock 20-12 loss to Filipino Mark Bariga, and Ken Egan was retired in round three against Cuba's Jose Gomez-Larduet.