| 21/12/1996 | Former Argentinian international Mario Kempes signs a 2-year contract with Club Lushnja, becoming the first foreign coach in Albania since World War II |
| 21/12/1995 | Jack Charlton retires after 10 years on the bench of N. Ireland (93 games) |
| 21/12/1991 | Springfield College (the place where Naismith invented basketball) celebrates the ''Centenary of Basketball'' |
| 21/12/1984 | Georgeann Wells becomes the first woman to dunk in a basketball game (Virginia - Charleston 110-82) |
| 21/12/1983 | Spain beat Malta 12-1. The Spaniards needed an 11 goal win to qualify for the European Cup finals |
| 21/12/1982 | Nikos Nioplias makes his debut with OFI in a match against Apollon Athens |
| 21/12/1981 | Cincinnatti defeat Bradley 75-73 in 7 overtimes. The game is the longest intercollegiate basketball game in NCAA history |
| 21/12/1975 | 19-year-old Bjorn Borg defeats Czechoslovakian Jan Kodes 6-4, 6-2, 6-2 and gives Sweden its first Davis Cup |
| 21/12/1972 | American tennis player Chris Evert turns professional at the age of 18. In her career she won 18 titles: 6 US Opens, 7 Roland Garros, 3 Wimbledon and 2 Australian Opens. She is the only female tennis player who won 1.000 singles (0.9 average, the best in professional tennis history). She set record by winning 125 matches by 3-0 and 55 consecutive till 1974, a record that Martina Navratilova smashed 10 years later (74 wins). She retired in 1994 after losing to Zina Garrison at the US Open tournament. In 1995 she became the 4th athlete to be unanimously elected to the International Tennis Hall of Fame |
| 21/12/1969 | OFI - PAOK 3-1 for the Greek league. All 4 goals are scored with headers |
| 21/12/1966 | Saudi Arabia win the Asian Cup after beating the United Arab Emirates 4-2 |
| 21/12/1945 | American general George Patton dies after a car accident in Germany at the age of 60. As a young lieutenant in 1912 he competed in the Stockholm Olympics as a member of the US team. He came up fifth in modern pentathlon after failing in shooting |
| 21/12/1913 | 42-year-old Arthur Wynne publishes the first crossword puzzle. The British born inventor emigrated to the United States at the age of 19. He initially worked on the “Pittsburgh Press” and later on the “New York World” newspaper, where he introduced the diamond shaped puzzle for the “Fun Section” of the Sunday edition, which he called a “World-Cross Puzzle”. Although the first puzzle had no references on sports, the following years, questions on sports will become very popular. |
| 21/12/1904 | The ''Federation Internationale des Clubs Motocyclistes'' is founded in a parisian restaurant (Ledoyen). Three months earlier motorcyclists from Austria, Denmark, France, Germany and Great Britain had competed for an international trophy in Dourdan, France. The federation will remain inactive for the following 8 years. On November 28, 1912 it will be re-established by 10 member states |
| 21/12/1891 | Basketball is played for the first time ever in Springfield, Massachusetts by a group of 18 players using a soccer ball. The first officially recorded game will take place on March 11, 1892 |
| 21/12/1877 | ''American Bicycling Journal'' is first published in Boston |
| 21/12/1849 | First ice skating club founded in Philadelphia, USA |