Wales' Andrew Selby (red) takes on China's Jiwal Zhang in Cardif
Barry's European bronze medallist Andrew Selby fell on points to Chinese star Jiwal Zhang in Team GB's Cardiff clash with the Rest of the World.
The Welsh bantamweight lost 16-11 to the hard-hitting visitor at Cardiff International Arena.
Another Welshman, Cardiff welterweight Fred Evans, also suffered defeat, losing a savage clash with United States champion Errol Spence.
Evans went down in the first, but lasted to the end under heavy fire.
The bouts were part of a three-day boxing festival in Cardiff that culminates on Sunday with the World Boxing Confederation's star-studded Night of Champions.
The amateurs were watched by a galaxy of boxing's elite, including the likes of Roberto Duran, Carlos Zarate and Earnie Shavers, who all presented winners with prizes.
Despite the two Welshmen's losses, Team GB drew 6-6 with an impressive rest-of-the-world squad made up of fighters from Sweden, the United States, Ireland and China.
Victories for Nicola Adams, Luke Campbell, Tom Stalker and Scott Cardle put the home squad 4-2 in front at the interval but, after Evans' loss, three consecutive victories for Meng Fanlong, Babacar Camara and Sean Turner levelled the scores.
"I'm gutted everything was wrong," said Selby after his loss.
"I know I am a lot better than that, it was my worst performance ever, terrible.
"My timing was completely off, I felt tired after the first round and I just didn't stick to the game-plan.
"I was trying to impress the crowd too much and it cost me.
"I wasn't even boxing properly. I was just trying to scrap and take him out.
"The game-plan just went wrong. I didn't stick to it at all so I'm really disappointed.
"I'll learn from this, I think the problem was that it was in front of my home crowd.
"In a tournament I just stick to my game-plan and focus on my boxing - the crowd has never got to me before.
"I haven't fought in front of my fans for at least four years though. I suppose I just tried too hard to impress them.
"He was a good opponent too so I had to be at my best to beat him. I was nowhere near that so I'm not surprised I lost.
"I will just make sure I bounce back from this. I will go straight back to the gym, train hard and get this out of my system."