"Our feeling was that in a secret ballot people could vote for whoever they wanted without fear", World Rugby CEO Brett Gosper said.
"World Rugby ran an exhaustive and transparent process for 15 months to identify the best host nation, only for the process to go entirely opaque for the past two weeks".
The report found that South Africa is the favourite to win the bid.
"We thank World Rugby for replying to our letter".
Former Ulster and Ireland flanker Stephen Ferris added: "Having played in New Zealand in 2011, I've seen at first-hand how special an experience a World Cup can be".
"It's like losing in the 79th minute of a match when you're ahead", said Mark Alexander, the SA Rugby president who felt the need to apologise to the nation for raising its expectations. Unfortunately, the disappointing thing was that Scotland and Wales didn't support us.
"We can not hide our desolation but, for the sake of rugby we wish the 2023 tournament hosts every success".
Italy to miss World Cup after 0-0 draw with Sweden
Photo Alessandro Florenzi and Italy were eliminated from the 2018 World Cup when they failed to beat visiting Sweden on Monday. With this result, veteran Italian goalkeeper Gianluigi Buffon also announced his retirement from the game.
Week 11's best top-10 showdown?
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City of Las Vegas
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Were Analysts Bearish Barclays PLC (LON:BARC) This Week?
The Firm is focused on the acquisition, ownership, and operation of single-tenant, industrial properties across the United States. Its product range is focused on traditional family housing in its regional businesses and apartment schemes in Greater London.
Monday's Photos of the Day and Viral Videos
Trump's latest trick, on the final leg of a tour of Asia that included a fish feeding scandal in Japan, inspired the internet. Anti-riot police said 16 people were injured in the demonstration when protesters clashed with around 500 police officers.
Mattel shares soar on report of Hasbro takeover offer
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