The 2016 City of Onkaparinga ATP Challenger took place in a metropolitan suburb how far south of the Central Business District of Adelaide?
2016 City of Onkaparinga ATP Challenger: The 2016 City of Onkaparinga ATP Challenger was a professional tennis tournament played on hard courts. 2016 City of Onkaparinga ATP Challenger:  It took place in Happy Valley, Australia between 2–10 January 2016. Happy Valley, South Australia: Happy Valley is a metropolitan suburb of Adelaide, South Australia. Happy Valley, South Australia:  It is located 20 km south of the Central Business District of Adelaide.
20 km