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Both were sore after the 51-22 victory against Scotland and when they were examined again today, team Dr Deb Robinson decided they should get a further diagnosis.
Ellison was limping after damaging his foot, while Smith was in some discomfort with a facial injury after several heavy collisions in the match at Murrayfield.
Ellison had some version of 'turf toe' which had affected his work starting at second five eighths, while Smith had a very tender cheek.
There was encouraging news about fullback Israel Dagg, who had to be replaced in the test after landing heavily on his tailbone and backside.
He took some time to get to his feet before he left the field slowly but without any assistance.
Dagg told the staff he felt more comfortable today but his fitness for the next test against Italy remains in doubt.
If he is unable to turn out, Beauden Barrett, Cory Jane or Smith, if fit, would be contenders to fill the fullback duties or perhaps Aaron Cruden as a wildcard option.
The further tour prospects of flanker Adam Thomson remain uncertain after he was cited to front a judicial hearing to answer an inquiry into his careless bootwork on the head of his opposite Alasdair Strokosch.
Details about the hearing have not been finalised but Thomson may have to fly to London to answer the charge.
- Wynne Gray of the New Zealand Herald