Question: Were both Oliver Marach and Lukáš Dlouhý professional tennis players?

full_context: Document 1: Ivan Dodig: Ivan Dodig (born 2 January 1985) is a Croatian tennis player. His career-high ATP rankings are world No. 29 in singles and world No. 4 in doubles. Dodig is a Grand Slam champion after winning the 2015 French Open men's doubles title with Marcelo Melo.
Document 2: Andrea Hlaváčková: Andrea Hlaváčková (] ; born 10 August 1986) is a professional tennis player from the Czech Republic. Her highest singles ranking is world No. 58, which she reached in September 2012, and her highest doubles ranking is No. 3, reached on 22 October 2012. In her career, Hlaváčková has won 22 WTA doubles titles, as well as 19 ITF doubles and eight ITF singles titles. She has won two Grand Slam doubles titles, the 2011 French Open and the 2013 US Open, both times partnered with Lucie Hradecká. The pair are also the 2012 Olympic silver medallists. Hlaváčková was part of the winning Czech team in Fed Cup 2012 and also won the mixed doubles title at the 2013 US Open paired with Max Mirnyi.
Document 3: Oliver Marach: Oliver Marach (born 16 July 1980) is an Austrian professional tennis player. His highest ATP singles ranking is world No. 82, which he reached on August 7, 2005. His career high in doubles is world No. 8, set on October 18, 2010.
Document 4: Lukáš Dlouhý: Lukáš Dlouhý (born 9 April 1983) is a professional Czech tennis player on the ATP Tour. A doubles specialist, Dlouhý reached a career-high ranking of World No. 5 in June 2009.
Document 5: Lucie Hradecká: Lucie Hradecká (] ; born 21 May 1985 in Prague) is a professional tennis player from the Czech Republic. In her career, Hradecká has won 19 WTA doubles titles, and two Grand Slam titles, the 2011 French Open and the 2013 US Open, partnered both times by fellow Czech Andrea Hlaváčková. The pair are also the 2012 Olympic silver medallists in doubles. She has also won a mixed doubles Grand Slam title, the 2013 French Open with František Čermák. Her biggest singles career highlight to date was defeating former world number one Ana Ivanovic in the first round of the 2015 Australian Open.
Document 6: Radek Štěpánek: Radek Štěpánek (] ; born 27 November 1978) is a professional tennis player from the Czech Republic. His career-high singles ranking is world No. 8 and best doubles ranking is world No. 4. Štěpánek's biggest achievements are reaching two Masters 1000 event finals and the quarterfinals of Wimbledon in 2006, as well as winning the deciding match for Czech Republic's Davis Cup winning team in 2012 and again in 2013. In doubles, he won his first Grand Slam title at the 2012 Australian Open, along with Indian partner Leander Paes, defeating the Bryan Brothers in the final. Paes and Štěpánek also won the men's doubles title at the 2013 US Open, defeating Bruno Soares and Alexander Peya in the final.
Document 7: Lucie Šafářová career statistics: This list summarizes the main career statistics of Czech professional tennis player Lucie Šafářová. To date, Šafářová has won seven WTA singles titles and fifteen WTA doubles titles including five Grand Slam doubles titles with Bethanie Mattek-Sands at the 2015 Australian Open and French Open,; the 2016 US Open and 2017 Australian Open and French Open. Other highlights of Šafářová's career thus far include winning the 2015 Qatar Total Open, reaching the final of the 2015 French Open and making quarterfinal and semifinal appearances at the 2007 Australian Open and 2014 Wimbledon Championships, respectively. Šafářová achieved career high singles and doubles rankings of World No. 5 and World No. 2 on 14 September 2015 and 30 January 2017.
Document 8: Marin Čilić: 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.
Document 9: Martin Damm: Martin Damm (born 1 August 1972) is a former a professional tennis player from the Czech Republic. He is best known as a doubles player (his highest ranking being No. 5 in the world in April 2007). His highest singles ranking was No. 42 in August 1997. Damm won a total of 40 titles in doubles, including one Grand Slam title. He reached 5 singles finals.
Document 10: Adam Pavlásek: Adam Pavlásek (born 8 October 1994) is a tennis player playing on the ATP Challenger Tour from the Czech Republic. He reached his career-high ATP singles ranking of World No. 72 in January 2017. At the start of 2015, Pavlásek replaced injured countryman Radek Štěpánek in the Hopman Cup, playing alongside Lucie Šafářová. He made a name for himself by defeating world number 20 Fabio Fognini of Italy, Pavlásek's first ever win over a top 20 player.
Document 11: Dominic Thiem: Dominic Thiem (] ; born 3 September 1993) is an Austrian professional tennis player who has an ATP high ranking of world No. 7 which he first achieved on 6 June 2016. He has won eight singles titles on the ATP Tour.
Document 12: Łukasz Kubot: Łukasz Kubot (; born May 16, 1982) is a Polish professional tennis player. Kubot is a doubles specialist and won the 2014 Australian Open men's doubles title with Robert Lindstedt as well as the 2017 Wimbledon men's doubles title with Marcelo Melo. He has also had success in singles, achieving a career-high singles ranking of World No. 41 in April 2010 and reaching the quarterfinals of the 2013 Wimbledon Championships. In 2013 he was awarded the Gold Cross of Merit by Polish President Bronisław Komorowski.
Document 13: Olivier Rochus: Olivier Rochus (] ; born 18 January 1981) is a retired Belgian tennis player. He has won two singles titles in his career and in 2004 won the French Open doubles title partnering fellow Belgian Xavier Malisse. Rochus' career-high singles ranking is World No. 24.
Document 14: Martin Legner: Martin Legner (born December 17, 1961 in Tyrol) is a professional Austrian wheelchair tennis player who has been ranked number one for wheelchair doubles. Legner has won the Australian Open doubles title four times with Robin Ammerlaan since 2000, and has won eight doubles titles. Six of them are Australian Open Titles, the other two being French Open titles. He has won one French Open and one Australian Open singles title. He has represented his country at every Summer Paralympics since 1992, and has competed in both singles and doubles at all of those Games. His favorite surfaces are clay and hard court. As of April 7, 2007 his highest singles rank was number three. Also of that date, he was ranked number six for singles and doubles. His wheelchair is manufactured by Kronbickler. Legner is a fan of Bob Marley, and listens to his music aside from tennis.
Document 15: Alex O'Brien: Alex O'Brien (born March 7, 1970 in Amarillo, Texas) is a retired professional tennis player from the United States, who competed on the ATP Tour. He became the world No. 1 doubles player in May 2000 and was ranked as high as world No. 30 in singles in June 1997.
ground_truth: yes