A succession of decisions by referee Mike Adamson, his officiating team and television match official (TMO) Marius Jonker left Rennie frustrated with the coach defending his decision to go public with his complaints.
"Dave Rennie wishes to apologise to the match officials and to World Rugby for the choice of language used in post-match media commitments following the Wallabies Test match against Wales in Cardiff," Rugby Australia said in a statement.
