Wales lost 9 v 8 to France at Eden Park this morning and were cheered on by more than 60,00 supporters back home in the Millennium Stadium and Roberts said he hoped the side made the country proud.
"We can take a lot of pride in that performance," said Roberts.
"We can be proud of the way we played with 14 men for 70 minutes and we hope everyone back home is proud of us but it is heartbreaking.
"We went to a kick-chase game which paid dividends, we clawed our way back territorially and had a couple of opportunities to win the game.
"It's fine lines at this level but hopefully we've done everyone proud.
"We'll train hard this week, we won't throw it all away now, and try to win next week."