Question: Who is a former coach of a World No. 1 player, Elizabeth Smylie or Paul Annacone?

full_context: Document 1: Pete Sampras: Pete Sampras (born August 12, 1971) is a retired American tennis player widely regarded as one of the greatest in the history of the sport. He was a right-handed player with a single-handed backhand and a precise and powerful serve that earned him the nickname "Pistol Pete". His professional career began in 1988 and ended at the 2002 US Open, which he won, defeating rival Andre Agassi in the final.
Document 2: Patrick McEnroe: Patrick John McEnroe (born July 1, 1966) is a former professional tennis player and the former captain of the United States Davis Cup team.
Document 3: Paul Annacone: Paul Annacone (born March 20, 1963) is an American former touring professional tennis player and current tennis coach. He is the former coach of open-era leader in Grand Slams Roger Federer and former World No. 1 Pete Sampras. Annacone is currently a coach at ProTennisCoach.com and a commentator at Tennis Channel
Document 4: Samantha Stosur career statistics: This is a list of the main career statistics of professional Australian tennis player, Samantha Stosur. To date, Stosur has won eight WTA singles titles including one Grand Slam singles title at the 2011 US Open. She was also the runner-up at the 2010 French Open and a semi-finalist at the 2010 and 2011 WTA Tour Championships. Stosur has also enjoyed a successful doubles career, in which she has held the World No. 1 ranking and won twenty-four WTA doubles titles including two grand slam women's doubles titles at the 2005 US Open and 2006 French Open and two year-ending championships at the 2005 and 2006 WTA Tour Championships.
Document 5: Rennae Stubbs: Rennae Stubbs (born 26 March 1971) is an Australian retired tennis player. She was an Australian Institute of Sport scholarship holder. She has won four Grand Slam doubles titles and two Grand Slam mixed doubles titles. She was ranked world No.1 in doubles for three weeks in 2000. She represented Australia at four successive Summer Olympic Games: Atlanta 1996, Sydney 2000, Athens 2004, and Beijing 2008.
Document 6: 2010 Roger Federer tennis season: Roger Federer won the Australian Open, beating Briton Andy Murray, whom he also beat in the final of the 2008 US Open. Federer played in eighteen tournaments in 2010, and won five. He made the semifinals of his opening tournament at the Qatar Open in Doha, losing to Nikolay Davydenko, and at the Estoril Open, which he had won in 2008, losing to defending and eventual champion Albert Montañés. Federer was runner-up in the Mutua Madrileña Madrid Open to Rafael Nadal. At the French Open, he faced his opponent in the previous year's final, Robin Söderling at the quarterfinals stage and lost. As defending champion at Wimbledon, he was defeated in the quarterfinals by Tomáš Berdych in four sets, thus ending his streak of seven consecutive Wimbledon finals also falling to world no. 3, his lowest ranking since 2003. During the summer hard-court season, Federer hired Paul Annacone to be his coach and revive his form. At the 2010 US Open, Federer advanced to his seventh straight semifinal appearance, but lost to Novak Djokovic in five sets, despite holding two match points in the final set. Federer's ranking slipped from no. 2 to no. 3 after the tournament, but he finished the year strong with victories in Stockholm, Basel, and the ATP Tour Finals to pass Djokovic in the rankings and finish the year at no. 2.
Document 7: Pete Sampras career statistics: This is a list of the main career statistics of American former tennis player Pete Sampras. He turned professional in 1988 and his official retirement occurred in August 2003. During his career Sampras won 64 singles titles, including 14 titles at Grand Slam events. He competed in 16 ties for the United States Davis Cup team between 1991 and 2002 and was a member of the cup winning team in 1992 and 1995. Sampras reached the No. 1 ranking on April 12, 1993 and in total held that position for 286 weeks.
Document 8: Tony Roche: Anthony Dalton Roche, AO MBE (born 17 May 1945) is a former professional Australian tennis player, native of Tarcutta. He played junior tennis in the New South Wales regional city of Wagga Wagga. He won one Grand Slam singles title and thirteen Grand Slam doubles titles, and was ranked as high as World No. 2 by Lance Tingay of "The Daily Telegraph" in 1969. He also coached multi-Grand Slam winning World No. 1s, Ivan Lendl, Patrick Rafter, Roger Federer, Lleyton Hewitt and former World No. 4, Jelena Dokic.
Document 9: Margaret Court career statistics: This is a list of the main career statistics of Australian former tennis player Margaret Court. She won 64 Grand Slam events (24 singles, 19 doubles, 21 mixed doubles), which is a record for a male or female player. Her 24 Grand Slam singles titles and 21 in mixed doubles are also all-time records for both sexes. She achieved a career Grand Slam in singles, doubles, and mixed doubles. She is one of two women to have achieved "the" calendar year Grand Slam in singles in the Open Era (alongside Steffi Graf), and is the only woman to have achieved the mixed doubles Grand Slam, which she did twice.
Document 10: Samantha Stosur: Samantha Jane "Sam" Stosur ( ; born 30 March 1984) is an Australian professional tennis player. She is a former world No. 1 in doubles, a ranking which she held for 61 weeks, and a former world No. 4 in singles.
Document 11: Cara Black: Cara Black (born 17 February 1979) is a professional tennis player from Zimbabwe. She is primarily a doubles specialist, winning 60 WTA and 11 ITF titles in that discipline. A former no. 1 ranked women's doubles player in the WTA Rankings, she has won ten Grand Slam titles in women's doubles and mixed doubles combined. By winning the mixed doubles title at the 2010 Australian Open, Black became the third woman in the Open Era to complete a Career Grand Slam in mixed doubles (after Martina Navratilova and Daniela Hantuchová). Having won one singles title on tour, she also peaked at no. 31 in the singles rankings in March 1999.
Document 12: Elizabeth Smylie: Elizabeth Smylie (née Sayers, born 11 April 1963), sometimes known as Liz Smylie, is a retired Australian professional tennis player. During her career, she won four Grand Slam titles, one of them in women's doubles and three in mixed doubles. She also won three singles titles and 36 doubles titles.
Document 13: Virginia Wade: Sarah Virginia Wade, (born 10 July 1945) is a former professional tennis player from Great Britain. She won three Grand Slam singles championships and four Grand Slam doubles championships, and is the only British woman in history to have won titles at all four Grand Slam tournaments. She was ranked as high as No. 2 in the world in singles, and No. 1 in the world in doubles.
Document 14: Stefan Edberg: Stefan Bengt Edberg (] ; born 19 January 1966) is a Swedish former world no. 1 professional tennis player (in both singles and doubles). A major proponent of the serve-and-volley style of tennis, he won six Grand Slam singles titles and three Grand Slam men's doubles titles between 1985 and 1996. He also won the Masters Grand Prix and was a part of the Swedish Davis Cup-winning-team four times. In addition he won four Masters Series titles, four Championship Series titles and the unofficial Olympic tournament 1984, was ranked in the singles top 10 for ten successive years, 9 years in the top 5, and is considered one of the greatest players of his era. Edberg began coaching Roger Federer in January 2014, with this partnership ending in December 2015.
Document 15: Evonne Goolagong career statistics: This is a list of the main career statistics of Australian former tennis player Evonne Goolagong. During her career, which lasted from 1967 to 1983, Goolagong won seven singles titles at a Grand Slam event and was a runner-up on 11 occasions. In addition she won five Grand Slam doubles titles, partnering Margaret Court, Peggy Michel and Helen Gourlay, as well as one mixed doubles title with Kim Warwick. In total she won 82 singles titles, 46 doubles titles and 4 mixed doubles titles. She achieved a No. 1 singles ranking for a two-week period in April–May 1976 although this was only officially recognized in 2007. She was a member of the Australian Federation Cup teams that won the cup in 1971, 1973 and 1974.
ground_truth: Paul Annacone