Question: Marin Čilić won a Masters 1000 title at the 2016 tournament held in what suburb of Cincinnati?
Context: The 2009 Shanghai ATP Masters 1000 (also known as the 2009 Shanghai ATP Masters 1000–presented by Rolex) was a tennis tournament played on outdoor hard courts.  It was the 1st edition of the Shanghai ATP Masters 1000, and was classified as an ATP World Tour Masters 1000 event on the 2009 ATP World Tour.  It was played at Qizhong Forest Sports City Arena in Shanghai, People's Republic of China.  The inaugural edition was held from October 11 to October 18, 2009. The 2012 Boodles Challenge was an exhibition tournament held before Wimbledon to serve as a warm-up to players.  Taking place from 19 June 2012 to 23 June 2012 at Stoke Park in London, it was the 11th edition of the Boodles Challenge.  Marin Čilić won the title. The 2014 Western & Southern Open (the Cincinnati Masters) was a men's and women's tennis tournament that was played on outdoor hard courts August 11–17, 2014.  It was part of the ATP World Tour Masters 1000 of the 2014 ATP World Tour and of the WTA Premier 5 tournaments of the 2014 WTA Tour.  The 2014 tournament was the men's 113th edition and the women's 86th edition of the Cincinnati Masters.  The tournament is held annually at the Lindner Family Tennis Center in Mason (a suburb of Cincinnati), Ohio, United States. Goran Ivanišević (; born 13 September 1971) is a retired Croatian professional tennis player and current tennis coach.  He is the only person to win the men's singles title at Wimbledon as a wildcard.  He achieved this in 2001, having previously been runner-up at the championships in 1992, 1994 and 1998.  Before the 2001 tournament, he was ranked 125th and after his victory he was 16th.  His career-high singles ranking was World No. 2 (behind Pete Sampras) in 1994.  He coached Marin Čilić from September 2013 to July 2016, leading Čilić to his biggest achievement to date, the 2014 US Open title. The 2017 Western & Southern Open was a men's and women's tennis tournament played on outdoor hard courts from August 14–20, 2017.  It was a Masters 1000 tournament on the 2017 ATP World Tour and a WTA Premier 5 tournament on the 2017 WTA Tour.  The tournament was one of two headline events in the 2017 US Open Series.  The 2017 tournament was the 116th men's edition and the 89th women's edition of the Cincinnati Masters.  The tournament was held annually at the Lindner Family Tennis Center in Mason, a northern suburb of Cincinnati, in the United States. The 2013 Western and Southern Open was a men's and women's tennis tournament played on outdoor hard courts August 12–18, 2013.  It was part of the ATP World Tour Masters 1000 of the 2013 ATP World Tour, and of the WTA Premier 5 tournaments of the 2013 WTA Tour.  The 2013 tournament was the 112th edition (for the men) and the 85th (for the women) of the Cincinnati Masters.  The tournament is held annually at the Lindner Family Tennis Center in Mason (a suburb of Cincinnati), Ohio, United States. This is a list of the main career statistics of Croatian professional tennis player, Marin Čilić.  To date, Čilić has won 16 ATP singles titles including one grand slam singles title at the 2014 US Open, one ATP Masters 1000 title at the 2016 Western & Southern Open and a record four titles at the PBZ Zagreb Indoors.  Other highlights of Čilić's career thus far include a semi-final appearance at the 2010 Australian Open and three consecutive quarterfinals at the Wimbledon Championships from 2014 to 2016.  Čilić achieved a career high singles ranking of World No. 6 on November 21st, 2016. The 2012 Aircel Chennai Open was a 2012 ATP World Tour tennis tournament, played on outdoor hard courts.  It was the 17th edition of the only ATP tournament taking place in India and took place at the SDAT Tennis Stadium in Chennai, India.  It was held from 2 to 8 January.  Stanislas Wawrinka was the defending singles champion coming into the tournament but was knocked out in the quarterfinals.  Former champion Marin Čilić was originally in the field as the 4th seed before pulling out with a patellar tendon injury.  Finally, fourth seed Milos Raonic from Canada defeated world no. 9 and top seeded Serb Janko Tipsarević to win only his second ATP title.  Raonic became the first player since Roger Federer in 2008 to win an ATP title without losing a serve.  The doubles title went to the Indo-Serb pair of Leander Paes and Janko Tipsarević after they defeated the Israeli pair of Jonathan Erlich and Andy Ram. The 2016 Western & Southern Open was a men's and women's tennis tournament played on outdoor hard courts from August 15–21, 2016.  It was a Masters 1000 tournament on the 2016 ATP World Tour and a WTA Premier 5 tournament on the 2016 WTA Tour.  The tournament was one of two headline events in the 2016 US Open Series.  The 2016 tournament was the 115th men's edition and the 88th women's edition of the Cincinnati Masters.  The tournament is held annually at the Lindner Family Tennis Center in Mason (a northern suburb of Cincinnati), Ohio, United States. The 2015 Western & Southern Open was a men's and women's tennis tournament played on outdoor hard courts August 15–23, 2015.  It was part of the ATP World Tour Masters 1000 of the 2015 ATP World Tour and of the WTA Premier 5 tournaments of the 2015 WTA Tour, as well as a 2015 US Open Series event.  The 2015 tournament was the men's 114th edition and the women's 87th edition of the Cincinnati Masters.  The tournament is held annually at the Lindner Family Tennis Center in Mason (a northern suburb of Cincinnati), Ohio, United States.
Answer: Mason