Nicola Adams guaranteed Great Britain's first women's boxing medal with victory over Bulgaria's Stoyka Petrova at ExCe, but there was disappointment for Natasha Jonas and Savannah Marshall who both crashed out.
Adams boxed superbly to secure a 16-7 win and book at least a bronze medal, with a place in the Olympic final at stake on Wednesday when she will face Mary Kom. Jonas produced a proud performance in losing 26-15 to the seemingly unbeatable four-time world champion Katie Taylor from Ireland.
But there was a shocking loss for world champion Marshall, rated as arguably the hosts' best hope of boxing gold, who produced a flat-footed and lethargic performance in going down 16-12 to Marina Volnova of Kazakhstan.
Holly Bleasdale's hopes for an Olympic pole vault medal ended in bitter disappointment as nerves appeared to get the better of her on the big stage. The 20-year-old from Lancashire was on the verge of tears as she failed her third and final attempt at 4.55 metres, well below her best this summer of 4.71m.
She said: "The conditions weren't great, it was really bad headwind. I'm really disappointed with how I did. I felt like I could have jumped around 4.70m but I struggled to cope with the conditions."
Fellow athlete Perri Shakes-Drayton also suffered a night to forget in the 400 metres semi-finals. The East Londoner at first failed to progress as a fastest loser, then was sent through when Denisa Rosolova was disqualified for a lane infringement and finally was out again as the Czech team successfully appealed.
Diving hope Jack Laugher suffered a shock exit in an error-strewn first round of the men's three-metre springboard while Chris Mears sneaked through to the semi-final. Great Britain's women's hockey team slipped to a 2-1 defeat to Holland, but with their semi-final qualification already secured the only effect was to give them a slightly tougher draw.
Great Britain men's Olympic handball adventure is over after their preliminary stage campaign came to an end, but they saved their best until last in a valiant 41-24 defeat to reigning silver medallists Iceland. The men's basketball team gave coach Chris Finch a fitting send off and ended their campaign with a 90-58 victory over China
Great Britain's men's were left to mull over an Olympic volleyball campaign that did not yield even a set win as Argentina whitewashed them 3-0 in their final group game.
There will be British representation in an Olympic synchronised swimming final for the first time in 20 years after Jenna Randall and Olivia Federici qualified in ninth for the duet, as Russia close in on their fourth consecutive gold. The men's water polo team ended their campaign with a fifth successive defeat as Montenegro breezed past the hosts 13-4.