Higginbotham's coach Robbie Deans told media after last night's test that he was "taking notes" and didn't see the two incidents, but his opposite Hansen was in no doubt as to what transpired.
"I saw the headbutt. It was another cheap shot," Hansen said. "He [McCaw] seems to get them every week but everyone seems to miss them.
"You people [New Zealand media] see it week-in, week-out. If you don't think it's right, then write it, or say it on TV. We saw it, it was a cheap shot and we hope the judicial people can sort it out."
McCaw tends to treat such incidents as coming with the territory but gave an indication as to his growing frustration when saying: "It annoyed me at the time but it will get dealt with I guess. It gets a bit frustrating at times. It's a bit annoying."
No match officials saw the latest attacks on McCaw but the agitation among the New Zealand fans among the crowd of 51,000 as they saw replays on the big screen could be clearly heard on television coverage.
Higginbotham should get a ban of at least two weeks if precedents are anything to go by. Springboks lock Eben Etzebeth was suspended for a fortnight for the merest suggestion of a headbutt on Wallabies counterpart Nathan Sharpe in Perth recently and the use of the head is seen as an aggravating factor.
Greyling was suspended for two weeks - but only one Rugby Championship match - for his flying attack on McCaw in Dunedin.