Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Sabine Hack (born July 12, 1969, in Ulm) is a former professional tennis player from Germany. She began her career on the WTA Tour in 1983. She won four singles and one doubles titles in her career. Her best Grand Slam performance was reaching the quarterfinals at the 1994 French Open. Hack reached a career-high ranking of No. 13 in the world in January 1995. She retired from the tour in 1997. A singles player or doubles team that wins all four Slam tournaments in the same year is said to have achieved the Grand Slam. If the player or team wins all four consecutively, but not in the same calendar year, it is called a Non-Calendar Year Grand Slam.