Premise: The 2017 City of Onkaparinga ATP Challenger was a professional tennis tournament played on hard courts. It was the third edition of the tournament and part of the 2017 ATP Challenger Tour. It took place in Happy Valley, Australia from 2 to 8 January 2017.
Hypothesis: The ATP Challenger was hosted in several different countries in its history, including Happy Valley, Australia where it will return in the future.