2015 City of Onkaparinga ATP Challenger
The 2015 City of Onkaparinga ATP Challenger was a professional tennis tournament played on hard courts. It was the first edition of the tournament which was part of the 2015 ATP Challenger Tour. It took place in Happy Valley, Australia between 3–11 January 2015.ATP entrants
Seeds
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
The following players received entry as a lucky loser:
Singles