The 2016 City of Onkaparinga ATP Challenger was a professional tennis tournament played on hard courts. It was the second edition of the tournament which was part of the 2016 ATP Challenger Tour. It took place in Happy Valley, Australia between 2–10 January 2016.
The tournament concluded 12 January 2016.
It is incorrect because it states in the context that it ended 10 January 2016. That's also the reason it belongs in the category. I think the dates are what tripped up the AI.