Carter left the Millennium Stadium with boos ringing in his ears following an incident that incensed Wales coaches Warren Gatland and Shaun Edwards.
Carter will face a disciplinary hearing in Milan today, where the New Zealand squad has arrived to prepare for next weekend’s clash against Italy.
Carter, who was not yellow-carded for the offence by match referee Craig Joubert, could receive a minimum one-week ban.
Anything more than that would put his participation against England at Twickenham on November 21 in grave doubt.
Carter, capped 64 times, kicked 14 points during the All Blacks’ 19-12 victory. He was cited by Australian match commissioner Scott Nowland.
Roberts has attempted to play down the tackle.
“Looking at the replay it did look quite high,” said substitute Wales scrum-half Roberts.
“He did apologise to me. He said ‘sorry for the tackle’ after the game.
“Things like that happen in games, and you just have to take it on the chin. It looked bad, but I was fine.
“Everyone has got their views and opinions, but as a player you just get on with it. The referee makes decisions.”
Gatland, though, has no doubt Carter should have been yellow-carded, claiming: “It was a head-high tackle.
“A guy makes a break in the 22, and if that had happened at the other end then it would have been a penalty and a yellow card.
“All the officials missed it, so we are pretty disappointed with that.”
Meanwhile Alun-Wyn Jones conducted a brutal and personal honesty session after Wales’ latest attempt to beat the All Blacks ended in another frustrating failure.
Jones felt the pain of defeat more than most following New Zealand’s 19-12 triumph – and he was not afraid to admit it.
The Lions lock’s late 70-metre interception gallop fleetingly threatened an unlikely fightback as Wales chased a first win in the fixture since 1953.
Not only did Jones’ dash for glory fail though, but Wales also messed up a late attacking lineout when substitute hooker Huw Bennett threw long – straight into the hands of All Blacks flanker Adam Thomson.
And when it came to accepting responsibility, Jones fronted up like a man who had carried the weight of a nation on his shoulders – only to fall flat on his face.
“As a player, there are 101 things you can do in that situation,” he said, recalling his interception of All Blacks scrum-half Jimmy Cowan’s pass.
“That will probably be my first and last international interception, but I should have done a lot better.
“Inside, Alun-Wyn Jones is not very happy with what happened.
“I turned in, but I didn’t see the player (New Zealand wing Zac Guildford) coming across. If I had gone on the outside, I would have probably got a bit further towards the line.”
Jones desperately tried to fling the ball out to unmarked centre Tom Shanklin, but Guildford’s timely intervention denied Wales during the lung-busting closing exchanges.
“World-class players finish things like that, and I don’t think it was a world-class instance in the game for myself,” added Jones.
Scorers for Wales: Pens: S. Jones 4.
WALES: Hook, Halfpenny, Shanklin, J. Roberts, S. Williams, S. Jones, Cooper, Jenkins, Rees, P. James, A. Jones, Charteris, Powell, M. Williams, R. Jones.
Replacements: M. Roberts for Cooper (54), Bennett for Rees (60), D. Jones for P. James (60), B. Davies for Charteris (68), D. Jones for Powell (66).
New Zealand scorers: Tries: Hore. Cons: Carter. Pens: Carter 4.
NEW ZEALAND: Muliaina, Jane, C. Smith, Nonu, Guildford, Carter, Leonard, Crockett, Hore, Tialata, Thorn, Eaton, Kaino, McCaw, Read.
Replacements: Cowan for Leonard (49), Franks for Crockett (59), Donnelly for Eaton (54), Thomson for Read (65).