Question: Juan Carlos Ferrero and Stan Wawrinka, are both what?

full_context: Document 1: 2016 US Open – Men's Singles: Novak Djokovic was the defending champion, but lost in the final to Stan Wawrinka, 7–6, 4–6, 5–7, 3–6. This was the first time the men's singles champion at the US Open won the match after losing the first set since Juan Martín del Potro in 2009. This was also the first time the men's singles champion at the US Open won the title after being a match point down since Djokovic in 2011, with Wawrinka having saved a match point against Dan Evans in the 3rd round. As he had done in his 2 previous grand slam titles, Wawrinka again defeated the world No. 1 in the final.
Document 2: Juan Carlos Ferrero: Juan Carlos Ferrero Donat (] ; born 12 February 1980) is a retired professional tennis player, and a former world No. 1 player, from Spain. He captured the men's singles title at the 2003 French Open, and in September of that year, became the 21st player to hold the world No. 1 ranking. He was also the runner-up at the 2002 French Open and the 2003 US Open. His nickname is "Mosquito" due to his speed and his slight physical build. Ferrero retired from the game after the 2012 Valencia Open 500.
Document 3: 2017 US Open – Men's Singles: Stan Wawrinka was the defending champion, but was unable to defend the title due to a knee injury that ended his season prematurely. Wawrinka's withdrawal ended his streak of 50 consecutive grand slam appearances, dating back to the 2005 French Open.
Document 4: Marin Čilić career statistics: 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.
Document 5: 2015 Stan Wawrinka tennis season: The 2015 Stan Wawrinka 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, Stan won his second major title at the French Open, defeating Roger Federer and Novak Djokovic in the process.
Document 6: Juan Martín del Potro: Juan Martín del Potro (] , born 23 September 1988), also known as Delpo is an Argentinian professional tennis player who is currently ranked world No. 24 in men's singles by the Association of Tennis Professionals (ATP). His biggest achievement has been winning the 2009 US Open, defeating Rafael Nadal in the semifinal and 5-time defending champion Roger Federer in the final. He was the first to defeat both Federer and Nadal during the same major and was the only man outside the Big Four to win a major between the 2005 French Open and the 2013 US Open, a span of 35 tournaments. He is also the second Argentine and the fifth-youngest man to win the US Open in the Open Era. Other career highlights include winning the bronze medal in men's singles at the 2012 London Olympics and the silver medal at the 2016 Rio Olympics and being part of his country's successful Davis Cup team; but his career has also been hampered by a succession of wrist injuries.
Document 7: 2014 Stan Wawrinka tennis season: The 2014 Stan Wawrinka tennis season began at the Chennai Open, where he won the title for the second time in his career. This was followed by victory at the Australian Open, where he defeated defending champion Novak Djokovic in the quarterfinals, followed by victory over world no. 1 Rafael Nadal in the final, to win his first ever Grand Slam title, launching him to a career-high no. 3 in the world, and the Swiss no. 1 (ahead of Roger Federer) for the first time in his career. Additionally, he won his first Masters 1000 title, defeating compatriot Federer in the final after coming back from a set down. During the first half of the season, Wawrinka went a perfect 6–0 against top-10 opponents, including wins against three of the "Big Four" (Djokovic, Nadal, and Federer). He also reached the semifinals of the ATP World Tour Finals for the second time in a row and finished the year helping Switzerland win their first Davis Cup.
Document 8: Albert Costa: Costa began playing tennis at the age of five. He first came to the tennis world's attention as an outstanding junior player. In 1993, he reached the French Open junior final and won the Orange Bowl. He turned professional later that year and quickly established a reputation as a strong clay court player. Spanish former player and commentator for Spanish television Andrés Gimeno used to call him "the man with two forehands", because he could hit with the same accuracy and strength both forehand and backhand. In 1994, he won two challenger series events and was named the ATP's Newcomer of the Year.
Document 9: Juan Mónaco: Juan Mónaco (] ; born 29 March 1984), nicknamed "Pico", is a male former tennis player from Argentina. He won nine singles titles, reached the semifinals of the 2010 Shanghai Masters and the 2012 Miami Masters, and achieved a career-high singles ranking of world no. 10 in July 2012. He announced his retirement from professional tennis on 15th May, 2017.
Document 10: 2016 French Open – Legends Under 45 Doubles: Juan Carlos Ferrero and Carlos Moyá were the defending champions and successfully defended their title, defeating Sébastien Grosjean and Fabrice Santoro in the final, 6–4, 6–4.
Document 11: Rafael Nadal: Rafael "Rafa" Nadal Parera (] , ] ; born 3 June 1986) is a Spanish professional tennis player, currently ranked World No. 1 in men's singles. Known as "The King of Clay", he is widely regarded as the greatest clay-court player in history. His evolution into an all-court threat has established him as one of the greatest tennis players ever.
Document 12: Jim Courier: James Spencer Courier Jr. (born August 17, 1970) is an American former World No. 1 professional tennis player. During his career, he won four Grand Slam singles titles, two at the French Open and two at the Australian Open. He holds the record for being the youngest man to have reached the finals of all four Grand Slam singles tournaments, at the age of 22 years and 11 months. He also won five Masters 1000 series titles. Until Novak Djokovic in 2016, Courier was the last man to win both the Australian and French Opens in the same calendar year.
Document 13: Hicham Arazi: Hicham Arazi (Arabic: هشام أرازي‎ ‎ ; born 19 October 1973) is a former male tennis player from Morocco. He played professionally from 1993 to the end of 2007. The left-hander reached his career-high ATP Tour singles ranking of world No. 22 on November 5, 2001. During his career, Arazi captured one singles title, in Casablanca. "The Moroccan Magician" reached the quarter-finals of the Australian Open twice and the French Open twice. As well as the aforementioned nickname, some tennis analysts called him "The Moroccan McEnroe" due to his talent - he played with incredible touch, and often enjoyed the support of the crowd even when not at home. He led Patrick Rafter, winner of the US Open in 1997 and 1998, two sets to love during the first round of the latter tournament. In the third set he was upset with several line calls, telling umpire Norm Chryst to "get out of here", which sparked the beginning of Arazi's meltdown (and Rafter's comeback). During his career, he notably gained victories over former World No. 1s and Grand Slam champions Roger Federer, Andre Agassi, Yevgeny Kafelnikov, Marat Safin, Lleyton Hewitt, Juan Carlos Ferrero, Carlos Moyá and Jim Courier.
Document 14: Stan Wawrinka career statistics: This is a list of the main career statistics of Swiss professional tennis player, Stan Wawrinka. To date, Wawrinka has won sixteen ATP singles titles, including three Grand Slam singles titles at the 2014 Australian Open, the 2015 French Open, and the 2016 US Open, and one ATP Masters 1000 title at the 2014 Monte-Carlo Rolex Masters. He was also a semifinalist at the 2013 US Open, the 2015 Australian Open, the 2015 US Open, and the 2013, 2014 and 2015 ATP World Tour Finals. He also has reached the quarterfinals at 2014 and 2015 Wimbledon. Wawrinka also won a gold medal partnering Roger Federer in men's doubles for Switzerland in the 2008 Summer Olympics in Beijing, beating Swedish team Simon Aspelin and Thomas Johansson. In 2014 Wawrinka was part of the Swiss National Team, winning the Davis Cup for the first time.
Document 15: Stan Wawrinka: Stanislas Wawrinka (] ; born 28 March 1985) is a Swiss professional tennis player. Professionally called "Stan", he reached a career-high Association of Tennis Professionals (ATP) world No. 3 singles ranking for the first time on 27 January 2014. His career highlights include three Grand Slam titles at the 2014 Australian Open, 2015 French Open and 2016 US Open, where he defeated the world No. 1 player in the final on all three occasions, reaching the final of the 2017 French Open, winning an ATP World Tour Masters 1000 title at the Monte-Carlo Masters in 2014, and reaching three other finals at 2008 Rome, 2013 Madrid and 2017 Indian Wells. He is sometimes considered as part of the newly established "Big Five", an expansion of the Big Four, which already consists of Roger Federer, Rafael Nadal, Novak Djokovic and Andy Murray.
ground_truth: professional tennis player