Question: Are John Austin and Marin Čilić are professional tennis players from different countries?

Context articles: Marinko Matosevic
2017 Laver Cup
2016 Swiss Indoors
John Austin (tennis)
David Goffin
2012 Aircel Chennai Open
Marin Čilić career statistics
2014 Marin Čilić tennis season
Marin Čilić
Goran Ivanišević

Marinko Matosevic (Croatian: "Matošević" ; born 8 August 1985) is an Australian professional tennis player.
 His career-high singles ranking is World No. 39, which he achieved in February 2013.
 Matosevic has defeated top players including Milos Raonic, Marin Čilić, Nikolay Davydenko, Jo-Wilfried Tsonga and John Isner.
On 24 August 2016, Roger Federer and Rafael Nadal were the first of six players to confirm their participation for team Europe.
 On 15 May 2017, more than eight months later, Milos Raonic was the first of six players to confirm his participation for the World team.
 By 24 August 2017, all six players from each team had been chosen: Roger Federer, Rafael Nadal, Alexander Zverev, Marin Čilić, Dominic Thiem, and Tomáš Berdych for team Europe, and Milos Raonic, John Isner, Jack Sock, Sam Querrey, Juan Martín del Potro, and Denis Shapovalov for team World.
 Shortly afterwards Raonic withdrew and was replaced by Nick Kyrgios.
 Later Frances Tiafoe took the place of del Potro who had also withdrawn.
The 2016 Swiss Indoors was a men's tennis tournament played on indoor hard courts.
 It was the 47th edition of the event, and part of the 500 series of the 2016 ATP World Tour.
 It was held at the St. Jakobshalle in Basel, Switzerland, from 24 October through 30 October 2016.
 Marin Čilić won the singles title.
John Austin (born July 31, 1957) is an American former professional tennis player born in Long Beach, California.
 He won the Wimbledon mixed doubles championship with his sister, Tracy Austin, in 1980, becoming the first brother and sister team to win a Grand Slam title together.
David Goffin (] ) (born 7 December 1990) is a Belgian professional tennis player who is currently ranked world No. 12 in men's singles by the Association of Tennis Professionals (ATP).
 He was born in Rocourt, Liège, Belgium.
 His breakthrough came when he reached the fourth round of the 2012 French Open as a lucky loser, eventually losing to Roger Federer in four sets.
 Goffin has defeated several higher-ranked players such as John Isner, Stan Wawrinka, Novak Djokovic, Marin Čilić, Milos Raonic, Jo-Wilfried Tsonga, Dominic Thiem and Tomáš Berdych, the latter without losing a game.
 He is the Belgian number 1 male tennis player as of 2017.
 On February 20, 2017 Goffin became the first Belgian male tennis player to reach the ATP top 10.
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.
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 2014 Marin Čilić tennis season began at the Chennai Open, where he won the title for the third time in his career.
 This was followed by an unsuccessful defense of his title at the Australian Open, where he lost in the semi-finals to eventual champion Novak Djokovic in five sets.
 A few months later, after a relatively unsuccessful clay season until then, Stan has won his second major title at the French Open, defeating Roger Federer and Novak Djokovic in the process.
Marin Čilić (; born 28 September 1988) is a Croatian professional tennis player.
 Over the course of his career, Čilić has won 17 ATP singles titles, including the 2014 US Open.
 His career-high singles ranking is world No. 5, achieved in September 2017.
 Čilić first came to international prominence by defeating then-World No. 2 Andy Murray in the fourth round of the 2009 US Open.
 He followed this by reaching the semifinals of the 2010 Australian Open.
 Among other achievements, Čilić was runner-up at the 2017 Wimbledon Championships, and was a semifinalist at the 2015 US Open as defending champion.
 Čilić is currently the youngest active male player to have won a slam.
 Čilić has reached at least the quarterfinal in all four grand slam tournaments.
 He has a very powerful serve and very powerful groundstrokes.
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.