By Andrew Fraser and Phil Gordos
BBC Sport in Athens
There was a surprise spectator at ringside as Amir Khan took another step towards
Olympic gold. Well, several actually.
WBC heavyweight champion Vitali Kitschko, who could soon be fighting Britain's Danny Williams, was one famous face watching the action.
Rowing legend Matthew Pinsent was another.
Pinsent won his fourth Olympic gold medal at the age of 33.
Khan, who is just 17, can land his first if he beats Mario Kindelan in Sunday's lightweight final.
The battle for top spot in the medals table looks like going right down to the wire.
At the end of play on Friday, the United States led the rankings with 29 golds, closely followed by China with 27.
The US might have won 33 more medals than their rivals in total but it's golds that count at the end of the day.
Whatever happens, the Chinese are poised to eclipse their best-ever tally at a summer Olympics, having taken 28 golds four years ago in Sydney.
There were a few worried faces in the taekwondo arena on Friday when Bertrand Gbongou was knocked unconscious by Austria's Tuncay Caliskan.
Gbongou was caught in the face by a roundhouse kick and was out cold for 10 minutes.
The Central African Republic athlete eventually came to, but was stretchered off the mat in a neck brace.
Thankfully the injury was not too serious, hospital doctors eventually diagnosing that Gbongou had suffered nothing worse than concussion.