Question: How many singles titles on the ATP tour have been won by the person who replaced Teymuraz Gabashvili as inaugural champion?

full_context: Document 1: 1990 SkyDome World Tennis Tournament – Singles: Joakim Nyström was the champion of the event when it last took place, in 1986. He did not participate in 1990.<br>Ivan Lendl won the title, defeating Tim Mayotte 6–3, 6–0, in the final.
Document 2: 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 3: 2013 Rafael Nadal tennis season: The 2013 Rafael Nadal tennis season officially began on February 5 with the ATP Tournament in Viña del Mar in Chile. He lost in the final, but rebounded with victories at São Paulo and Acapulco. He then won the first Masters 1000 event of the year at Indian Wells. Nadal skipped Miami, and finished Runner up to Novak Djokovic at Monte-Carlo. He followed that with victories at Barcelona, Madrid, and then Rome. At the French Open, he defeated Djokovic in an epic semifinal that went to 9–7 in the fifth set, before thrashing David Ferrer to win his 8th Roland Garros crown. He was then stunned by Steve Darcis in the first round of Wimbledon, in what would be his only defeat prior to the semifinals all season. Limping in the final set, many people thought his season was over, however a strong summer saw Nadal win Montreal, Cincinnati, and then the U.S. Open (def. Djokovic), thus clinching the Emirates Airlines U.S. Open Series. This granted him 3.6 million US dollars in prize money, the most money earned by a tennis player at a single tournament. A few days after the U.S. Open Final, he flew to Madrid to help Spain secure their World Group Playoff spot for 2014, with a victory against Sergiy Stakhovsky. He also scored a victory in doubles with Marc Lopez. These victories gave him a 75–7 (91.46%) record in singles, and 6–1 (85.71%) record in doubles in 2013.
Document 4: 2016 Open 13 – Singles: Gilles Simon was the defending champion, but lost in the first round to Teymuraz Gabashvili.
Document 5: Andy Murray: Sir Andrew Barron Murray, {'1': ", '2': ", '3': ", '4': "} (born 15 May 1987) is a British professional tennis player from Scotland currently ranked world no. 3 in men's singles. Murray represents Great Britain in his sporting activities and is a three-time Grand Slam tournament winner, two-time Olympic champion, Davis Cup champion and the winner of the 2016 ATP World Tour Finals.
Document 6: Thomas Emmrich: Thomas Emmrich (born 21 July 1953) is a former tennis player for East Germany. Between 1970 and 1988, Emmrich won 47 German Democratic Republic (GDR) titles (16 singles and 31 in the doubles and mixed). Unfortunately, he entered the tennis scene after the GDR had decided to promote only those sports which were relevant for the Olympics’ medals table. Thus, he was barred from international competitions outside the Eastern bloc countries and had to keep the status as an amateur. However, he gained some points at an ATP tournament in Sofia as GDR functionaries had not noticed that it had become part of the ATP tour. After this tournament, the ATP ranked him number 482—the only entry of a GDR tennis player in the ATP rankings.
Document 7: 2013 Morocco Tennis Tour – Kenitra – Singles: Dominic Thiem became the inaugural champion when Teymuraz Gabashvili retired 7–6, 5–1.
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: 2014 Karshi Challenger – Singles: Teymuraz Gabashvili was the defending champion, but decided not to compete.
Document 10: 2016 Open 13 – Doubles: Marin Draganja and Henri Kontinen were the defending champions, but Kontinen chose not to participate. Draganja played alongside Julian Knowle, but lost in the quarterfinals to Teymuraz Gabashvili and Nick Kyrgios.<br>
Document 11: 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 12: Félix Auger-Aliassime: 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.
Document 13: Diego Schwartzman: Diego Sebastián Schwartzman (] , ] ; born 16 August 1992) is an Argentine professional tennis player competing mainly on the ATP Tour. He has won one ATP singles title, and reached a career-high singles ranking of world No. 28 in 2017. He is a clay court specialist, and is noted for his "deadly" return game.
Document 14: 2017 Barcelona Open Banco Sabadell – Singles: Rafael Nadal was the defending champion and successfully defended his title, defeating Dominic Thiem in the final, 6–4, 6–1.
Document 15: 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.
ground_truth: eight