Justine Henin (French pronunciation: [ʒystin ɛnɛ̃]; born 1 June 1982) is a Belgian former professional tennis player. She was ranked as the world No. 1 in women's singles by the Women's Tennis Association (WTA) for 117 weeks, including as the year-end No. 1 in 2003, 2006 and 2007. Henin won 43 WTA Tour-level singles titles, including seven majors (four at the French Open, two at the US Open and one at the Australian Open), as well as an Olympic gold medal at the 2004 Athens Games and two Tour Finals titles. Coming from a country with little success in the sport, Henin (alongside Kim Clijsters) helped establish Belgium as a leading force in women's tennis, leading the country to its first Fed Cup crown in 2001. As of 2026, she is still the most recent female player to have reached the finals of all four grand slam tournaments within the same calendar year.
Henin was known for her all-court style of play and for being one of the few female players to use a single-handed backhand. Tennis experts cite her mental toughness, the completeness and variety of her game, her footspeed and footwork, and her one-handed backhand (which all-time great John McEnroe described as "the best single-handed backhand in both the women's or men's game") as the principal reasons for her success. She retired from professional tennis on 26 January 2011, due to a chronic elbow injury.
In June 2011, she was named one of the "30 Legends of Women's Tennis: Past, Present and Future" by Time. In 2016, she became the first Belgian tennis player inducted into the International Tennis Hall of Fame and in 2023, the International Tennis Federation awarded Henin its highest honor, the Philippe Chatrier Award.
Justine Henin, occasionally spelled Hénin, was born in Liège to José Henin and Françoise Rosière. Rosière, a French and history teacher, died when Justine was 12 years old. She has two brothers and a sister. When she was two years old, Justine's family moved to a house in Rochefort, situated next to the local tennis club, where she played tennis for the first time.
Henin's mother routinely took the young Henin across the border to France to watch the French Open. In 1995, shortly after her mother's death, Henin met her coach Carlos Rodríguez who guided her career both before her retirement in 2008 and during her 2010 comeback.
Henin, known as "Juju" to many of her fans, was coached by Carlos Rodríguez of Argentina. In 1997, she won the junior girls' singles title at the French Open. Early in her junior career, she regularly reached the late rounds of international competitions and won five International Tennis Federation (ITF) tournaments by the end of 1998.
She began her professional career on the Women's Tennis Association tour in May 1999 as a wild card entry in the Belgian Open clay tournament at Antwerp and became only the fifth player to win her debut WTA Tour event. She also won her hometown event, the Liège Challenger, in July 2000.
Henin established herself as a major competitor in 2001, consequently reaching the women's singles semifinals of the French Open and then upset the reigning Australian Open and French Open champion Jennifer Capriati in the semifinals of Wimbledon, losing to defending champion Venus Williams in three sets in the final. By the end of the year, Henin was ranked 7th in singles, with three titles to her name. Also that year, she reached the French Open women's doubles semifinals with Elena Tatarkova and helped Belgium to win the 2001 Fed Cup.
Moreover, Henin played for the German tennis club Weiß-Blau Schweinfurt in 2001.
In 2002, she reached four WTA finals, winning two of them, and finished the year ranked world No. 5. Her German Open victory, her first win at a Tier I tournament, was noteworthy as she beat Jennifer Capriati in a semifinal and Serena Williams in the final, the then No. 2 and No. 5 ranked players, respectively. At Wimbledon 2002, Henin beat former world No. 1, Monica Seles, in two tough sets.
Henin started the year as the 5th-ranked player in the world but lost to Kim Clijsters in the semifinals of the Medibank International in Sydney. In the fourth round of the Australian Open in Melbourne, she defeated Lindsay Davenport 7–5, 5–7, 9–7. In a match lasting more than three hours, Henin overcame a 4–1 final set deficit, high temperatures, and muscle cramps to defeat Davenport for the first time in her career. She then lost to Venus Williams in the semifinals in straight sets.
Henin also lost to Clijsters in the semifinals of the Proximus Diamond Games in Antwerp. At the Dubai Tennis Championships one week later, she defeated Monica Seles in the final 4–6, 7–6, 7–5 after Seles had a match point at 5–4 in the second set.
Henin's next tournament was the Tier I Miami Masters. She lost in the quarterfinals to world No. 10, Chanda Rubin, 6–3, 6–2.
At the clay court Family Circle Cup in Charleston, South Carolina, Henin defeated world No. 1 Serena Williams in the final. This was Williams' first loss of the year after 21 wins.
The following week, Henin reached the semifinals of the Bausch & Lomb Championships in Amelia Island, Florida, losing to eventual winner Elena Dementieva 3–6, 6–4, 7–5. Henin then helped Belgium defeat Austria 5–0 in a first round tie of the Fed Cup.
In May, Henin successfully defended her title at the German Open in Berlin. In the final, she saved three match points in the third set before defeating Clijsters.
At the French Open, she was the fourth seeded player and defeated the defending champion, Serena Williams, in a controversial semifinal 6–2, 4–6, 7–5 which saw Henin asked to acknowledge her raised hand during a Williams service motion. In the final, Henin defeated Clijsters in straight sets. This was her first Grand Slam title, and she was the first Belgian ever to win a Grand Slam singles title.
Henin then began her preparations for Wimbledon. At the grass court Ordina Open in Rosmalen, she lost in the final to Clijsters; she was forced to retire from the match after injuring her finger. At Wimbledon, Henin was the third seeded player. She defeated Mary Pierce in the fourth round and Svetlana Kuznetsova in the quarterfinals before losing to Serena Williams in straight sets.