Question: What sport are both the 2015 City of Onkaparinga ATP Challenger and Happy Valley, South Australia known for?

Related documents: [0]  [DOC] 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. [END] 
[1]  [DOC] Happy Valley is a metropolitan suburb of Adelaide, South Australia. It is located 20 km south of the Central Business District of Adelaide. [END]  
Answer: tennis
tennis