| 21/7/2023 | Siblings Anna-Maria and Irini Alexandri, two Greek women from Volos, win the World Synchronized Swimming Championship under the Austrian flag. In 2021, they had won the bronze medal at the European Athletics Championships. |
| 21/7/2023 | Cycling champion Konstantinos Livanos wins the silver medal in the keirin competition at the European Youth Track Championships in Portugal |
| 21/7/2021 | Led by the Finals MVP award winner Giannis Antetokounmpo, who scored 50 points and also had 14 rebounds and five blocked shots, Milwaukee Bucks defeat Phoenix Suns 105-98 winning their first NBA championship in 50 years. Antetokounmpo is the first player to have at least 40 points, 10 rebounds and five blocks in a Finals' game since blocks were first recorded in 1974, becoming the seventh player to have at least 50 points in the championship round. |
| 21/7/2019 | Dora Gound?ura becomes the first Greek fencer to win a world championship medal after winning bronze in individual sabre at the 2019 World Fencing championships in Budapest. |
| 21/7/2019 | Javelin thrower Dimitrios Tsitsos captured a bronze medal at the U20 European Championship in Boras, Sweden, which is his first career medal at a major international competition. The 18-year-old from Giannitsa improved his personal record from 72.91 metres to 77.79 metres. Andreas Pantazis also won a bronze medal at the triple jump competition with 15.91 improving his personal record. |
| 21/7/2004 | Rivaldo comes to Athens and signs with Olympiacos, being the greatest transfer ever
made in the history of greek football. Olympiacos adds his name with those of Carembeu (2001), Giovanni (1999), Zahovic (1999), Protasov (1990), Litovtchenko (1990) and Detari (1988) |
| 21/7/2002 | Michael Schumacher captures his 5th F1 world championship with a French Grand Prix victory, equaling Juan Manuel Fangio's record (5 F1 championships, 3 in a row) |
| 21/7/1996 | Greek weightlifter Leonidas Sapanis (59kg) wins the silver medal in Atlanta after lifting a total of 305kgs |
| 21/7/1992 | Mike Powell breaks the world long jump record in Sestriere with 8.99m. Nevertheless the new record is not recognized because the leap was wind-aided (+4.4) |
| 21/7/1991 | David Platt becomes the most expensive football player when he is traded from Aston Villa to Bari for 5.5 million pounds |
| 21/7/1985 | The most successful horse ''John Henry'' ($6.597.947 - 39 wins in 83 races) is retired at the age of 10 |
| 21/7/1978 | Hungarian top scorer Sandor Kocsis, the man "with the golden head" dies aged 49. Team mate, and almost the same age, with Ferenc Puskas at the national team of Hungary, with which he had 68 caps and 75 goals, he refuses to return to Hungary for political reasons |
| 21/7/1974 | Greek army officer Georgios Katsanis is killed in St Ilarion during the turkish invasion in Cyprus. He was a sprinter of Iraklis Salonica. To honour his memory the club names the volleyball court after him |
| 21/7/1970 | Bob Kalsu, the American football League (AFL) player of Buffalo Bills, dies at the age of 25 in Vietnam during action near the A Shau Valley. He is the first active professional American football player to loose his life in the Vietnam War and Del City (Oklahoma) High School’s football stadium will bear his name. |
| 21/7/1969 | Neil Armstrong and Buzz Aldrin, members of “Apollo 11”, are the first to walk on the moon |
| 21/7/1968 | Arnold Palmer becomes the first golfer to earn $1.000.000 in US Open after taking second place in PGA in Texas |
| 21/7/1943 | Charles William Paddock, olympic winner in 100m at the 1920 Olympics, is killed during a war flight. Nicknamed ''the world's fastest man'' Paddock had broken or equaled the world record 25 times |
| 21/7/1928 | Polish Halina Knonpacka is the first woman to win olympic medal in a track-and-field event |
| 21/7/1924 | The first, unofficial, Super Cup, is played in Greece. The match is between the champion Panathinaikos and the Cup title holder Olympiacos (3-0). Panathinaikos will also win the return match 2-0 on 28, July |
| 21/7/1924 | Panathinaikos is granted the ''Perivola'' ground on Queen Alexandra Avenue, already in use since 1921. In 1933 the first stands are built. It is the first football pitch in Greece with grass carpet. In 1981 prime minister Georgios Rallis names the stadium after Apostolos Nikolaidis, in memoriam of Panathinaikos' manager who died on October 15, 1980 |
| 21/7/1874 | The oldest athletic activity is recorded in a Smyrna newspaper, where there is a mention about fencing lessons given at the gymnasium of Issocrates private school |
