Question: What sport are both the 2015 City of Onkaparinga ATP Challenger and Happy Valley, South Australia known for?
Context: 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 Emami Kolkata Open ATP Challenger Tour (formerly known as State Bank of India ATP Challenger Tour) is a professional tennis tournament played on outdoor hard courts.  It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour.  It is held annually at the Bengal Tennis Association Stadium in Kolkata, India since 2014. The ATP Challenger Tour, known until the end of 2008 as the ATP Challenger Series, is a series of international men's professional tennis tournaments.  The top tier of men's tennis is the ATP World Tour, Challenger Tour events are the second highest level of competition, and the Futures tournaments on the ITF Men's Circuit are the third and final tier of international professional competition.  The ATP Challenger Tour is administered by the Association of Tennis Professionals.  Players who succeed on the ATP Challenger Tour earn sufficient ranking points to become eligible for main draw or qualifying draw entry at ATP World Tour tournaments.  Players on the Challenge Tour are either young players, those who fail to qualify for ATP events, or former ATP winners looking to get back into the big tour. 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. The 2015 Latrobe City Traralgon ATP Challenger was a professional tennis tournament played on outdoor hard court.  It was the fourth edition of the tournament which was part of the 2015 ATP Challenger Tour.  It took place in Traralgon, Australia between 26 October – 1 November 2015. 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. Félix Auger-Aliassime (born August 8, 2000) is a Canadian professional tennis player.  He reached a career high ATP singles ranking of No. 161 on September 18, 2017 and a career high ITF junior ranking of No. 2 on June 6, 2016.  He is the youngest player ever to qualify and to win a main draw match on the ATP Challenger Tour.  With his titles at the Open Sopra Steria de Lyon in June 2017 and the Copa Sevilla in September 2017, he became the seventh youngest player in history (16 years, 10 months) to win an ATP Challenger title and the second youngest to win multiple ATP Challenger titles.  Auger-Aliassime won the 2016 US Open junior singles title and the 2015 US Open junior doubles title with compatriot Denis Shapovalov. The City of Onkaparinga ATP Challenger is a professional tennis tournament played on outdoor hard courts.  It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour.  It is held annually at the Happy Valley Tennis Club in Happy Valley, Australia, since 2015. Happy Valley is a metropolitan suburb of Adelaide, South Australia.  It is located 20 km south of the Central Business District of Adelaide. The Internazionali Tennis Val Gardena Südtirol "(also known as the Sparkassen ATP Challenger on the ATP Challenger Tour)" is a tennis tournament held in Ortisei, Italy since 2000.  The event is part of the ATP Challenger Tour and the ITF Women's Circuit and is played on indoor hard courts.  The event was previously a $100,000+H ITF Women's Circuit category from 2008 to 2009.
Answer: tennis