Wales prop Chris Horsman has been warned over his future conduct after his yellow card for punching a South African opponent in Saturday's defeat. Horsman was cautioned with Wales just seven points down and with Springbok Percy Montgomery already in the bin.
Wales coach Mike Ruddock said: "I'm not happy with the yellow card and measures have been taken in that regard.
"He was warned before the game that his discipline was important and I feel he has let us down."
The Worcester prop, who was winning only his third cap, received his dressing down in a one-to-one meeting by Ruddock on Sunday.
Before punching opposite number CJ van der Linde under the nose of the referee, the 27-year-old had played a key role in giving Wales a forward platform against a fearsome Springbok pack.
 | I am not a dirty player by any means, I am just disappointed to have let everyone down |
But while Horsman cooled down for 10 minutes on the sidelines, the visitors scored a third try to open a 23-9 lead which effectively ended Wales' hopes of victory.
"I let myself down and I let the squad down," Horsman said. "I held my hands up and I was the first to apologise in the changing room.
"I never expected to be sent off in a Welsh jersey and I am genuinely really, really upset. But you learn. I am not a dirty player by any means, I am just disappointed to have let everyone down.
"It takes the gloss off your individual performance. We controlled the game up front against a team that prides itself on being strong and physical.
"We matched them in some areas and in others I think we had the nudge on them."