Question: What sport do Gabriela Sabatini and Yannick Noah have in common?

Context paragraphs:
1996 US Open – Women's Singles: Steffi Graf successfully defended her tile, defeating Monica Seles 7–5, 6–4 in the final to win the Women's Singles title at the 1996 US Open.  It was a rematch of the 1995 US Open final, where Graf defeated Seles in three sets.  It also marked the final time Seles and Graf would play each other at the US Open.  The 1996 U.S Open proved to be the last for Gabriela Sabatini, as she retired later that year.  Sabatini was twice a finalist at the U.S Open.  In the 1988 US Open final, Sabatini lost to Graf in three sets.  Two years later, at the 1990 US Open, Sabatini defeated Graf in two sets to win her only Grand Slam title.

1989 Lufthansa Cup – Singles: Steffi Graf was the defending champion going into the final against her rival Gabriela Sabatini.  Just the previous month, Sabatini defeated Steffi Graf 3–6, 6–3, 7–5 in the final at Amelia Island, Florida.  Now, in her native Germany, Steffi would turn the tables against Sabatini, beating her 6–3, 6–1.  Prior to this match, Sabatini had played in four finals in 1989, with her winning twice.  For Steffi, this victory was her seventh of the year, and marked the sixteenth time out of nineteen matches she had beaten Sabatini.

1988 Virginia Slims of Florida: The 1988 Virginia Slims of Florida was a women's tennis tournament played on outdoor hard courts at the Boca Raton Resort & Club in Boca Raton, Florida in the United States and was part of Tier II of the 1988 WTA Tour.  The tournament ran from March 7 through March 13, 1988.  Fourth-seeded Gabriela Sabatini won the singles title and earned $60,000 first-prize money, ending a 30-match winning streak by Steffi Graf.  It was Sabatini's first win over Graf after 11 previous defeats.

1990 US Open – Women's Singles: Steffi Graf was the two-time defending champion, but she was defeated in the final by her rival Gabriela Sabatini, in what was a rematch of the 1988 US Open final and the 1989 US Open top half semifinal.  It also proved to be the first and only time Sabatini would defeat Graf in Grand Slam competition.

Graf–Sabatini rivalry: Steffi Graf and Gabriela Sabatini are retired professional tennis players who played each other on 40 occasions between 1985 and 1995.  Steffi Graf was the world No. 1, whilst Sabatini reached a career high of No. 3.  They are both Grand Slam Champions, the German winning 22 titles whilst Sabatini won her only Grand Slam title against Graf.  The pair also teamed up to reach three French Open finals and won the 1988 Wimbledon crown.

Tweener (tennis): The tweener or between-the-legs shot is a difficult tennis shot where a player hits the ball between his or her legs.  It is typically performed facing away from the opponent, when the player attempts to recover a lob and has no time to turn back around, and hits the ball backward between their legs.  Forward-facing tweeners, sometimes called "front tweeners", are also occasionally employed.  In competitive matches the tweener is a crowd-pleasing, seldom used last resort, but it is a common trick shot in exhibitions.  Players who famously executed the backward shot include Guillermo Vilas (whose version was called the "Gran Willy"), Yannick Noah, Ilie Nastase, Gabriela Sabatini, Roger Federer, Juan Martín del Potro, Nick Kyrgios and Agnieszka Radwańska.

Gabriela Sabatini: Gabriela Beatriz Sabatini (] ; born 16 May 1970) is an Argentine former professional tennis player.  She was one of the leading players on the women's circuit in the late-1980s and early-1990s.  She won one women's grand slam singles title at the US Open in 1990, the women's grand slam doubles title at Wimbledon in 1988, two WTA Tour Championships titles in 1988 and 1994, and a silver medal at the 1988 Olympic Games in Seoul.

All Star Tennis '99: All Star Tennis '99 is a simulation tennis game for the Nintendo 64, PlayStation, and Game Boy Color released in 1999, that was developed by Smart Dog and published by Ubisoft.  The featured player on the USA and Europe versions is Michael Chang while in the French version the featured player is Yannick Noah who, has his name above the title as Yannick Noah All Star Tennis '99.  It was one of the first tennis games for the N64 and the only one for that system in the "USA" until Mario Tennis.  It was preceded by Let's Smash/Centre Court Tennis in Japan and Europe, for the Nintendo 64, while being one of many "tennis" games on PlayStation and Game Boy Color.

1988 Pan Pacific Open – Singles: Gabriela Sabatini was the defending champion but did not compete that year.

Yannick Noah: Yannick Noah (born 18 May 1960) is a former professional tennis player from France.  He is best remembered for winning the French Open in 1983 and as a highly successful captain of France's Davis Cup and Fed Cup teams.  During his career, which spanned almost two decades, Noah captured a total of 23 singles titles and 16 doubles titles, reaching a career-high singles ranking of World No. 3 (in July 1986) and attaining the World No. 1 doubles ranking the following month.  Since his retirement from the game, Noah has remained in the public eye as a popular music performer and as the co-founder, with his mother, of a charity organization for underprivileged children.  Noah is also the father of Joakim Noah of the NBA New York Knicks.

Supporting paragraphs: Gabriela Sabatini Yannick Noah
Answer: tennis