Ben Whittaker claimed Olympic silver in the men's light-heavyweight final after losing to Cuban southpaw Arlen Lopez.
Whittaker was the latest Team GB boxer to come unstuck against Cuba following Pat McCormack's loss to Roniel Iglesias 24 hours before.
The 24-year-old looked to establish his jab early on, but was constantly beaten to the punch by Lopez who won the first two rounds on four of the five judges' scorecards.
There was a huge mountain to climb for Whittaker in the final round, a round which he won, but it was Lopez who was crowned Olympic champion after winning on four of the judges' scorecards.
Meanwhile, Frazer Clarke failed to become the third successive Briton to reach a men's super-heavyweight final after cuts stopped his contest with Bakhodir Jalolov.
Clarke came into this contest with unhealed cuts from his quarter-final with Mourad Aliev, and while he wobbled the top seed in the second round, the cut above Clarke's right eye got worse with Jalolov continuing to target the area.
The referee was forced to intervene and stop the contest allowing Jalolov to advance to the final, his movement and precise punching put him ahead on four of the five judges' cards.
Speaking after the fight, Clarke was delighted with finally claiming an Olympic medal.
"In the past 18 months I gave more sacrifices then I ever had. I'm Olympic bronze medallist - I could never have seen that for myself." Clarke said.
While Whittaker was very dissapointed with how his contest played out, Clarke, who is also the captain for the Team GB boxing squad, had plenty of praise for his teammates in Tokyo.
"It's been an absolute pleasure to captain this team. It's been an honour. I might be the captain on paper, but there are 11 captains in this team,"