| 25/5/2025 | 22-year-old Greek European javelin champion Elina Dzengo scores her third victory this year in the Diamond League, winning the first place in the Rabat tournament in Morocco with a throw of 64.60m. |
| 25/5/2025 | Fenerbahce Beko Istanbul becomes the Turkish Airlines EuroLeague champion for the second time in club history after defeating AS Monaco 70-81 in the 2025 Championship Game at Etihad Arena in Abu Dhabi and Nigel Hayes-Davis wins the Final Four MVP title. Olympiacos defeated Panathinaikos AKTOR Athens 97-93 in the Third-Place Game. |
| 25/5/2024 | 22-year-old wrestler Giorgos Kouyoumtsidis defeats Azeri Ali Tsokaev 4-1, finishing the event without losing a technical point, and is crowned European U23 champion in Baku, Azerbaijan for the 3rd consecutive time, following his victories in Plovdiv in 2022 and in Bucharest in 2023 |
| 25/5/2022 | Jose Mourinho guides AS Roma to a Europa Conference League triumph following their 1-0 win over Feyenoord at the final and becomes the first manager to win all three active major European competitions (Uefa Champions League, Uefa Europa League and Uefa Europa Conference League). On top of that, he has won all five European finals in which his sides have competed. The Portuguese football manager had won Champions League triumphs with Porto in 2004, Inter Milan in 2010, and the Europa League with Manchester United in 2017. |
| 25/5/2020 | The Executive Board announces the cancellation of the 2019-20 Turkish Airlines EuroLeague and 7DAYS EuroCup, as well as the Euroleague Basketball Adidas Next Generation Tournament and EuroLeague Academy due to the COVID-19 (coronavirus) global pandemic. |
| 25/5/2016 | Greece captain Nikos Zisis announces his decision to retire from the national team. Zisis, who turns 33 in August, played for Greece during 17 consecutive summers, a record among contemporary European players. Zisis first pulled on the national team jersey at the 1999 European Championship for Cadets and propelled Greece to the silver medal. He made his senior national team debut in November 2001, when he was just 18, in a game against Romania for the FIBA EuroBasket 2003 Qualifiers. The following summer he led Greece to the top of the podium at the European Championship for Young Men. His first major tournament was the 2004 Athens Olympics. The Brose Baskets Bamberg point guard helped Greece earn gold at FIBA EuroBasket 2005, silver at FIBA Basketball World Cup 2006 and bronze at FIBA EuroBasket 2009. |
| 25/5/2013 | Bayern München wins the 2013 UEFA Champions League by defeating Borussia Dortumund 2-1 in the first all-German final in Wembley, London. Bayern becomes the second side to recover from a UEFA Champions League final loss to triumph the next year, matching AC Milan's redemptive win in 1994. Bayern are now joint third, behind Real Madrid CF (9 titles) and AC Milan (7 titles), in the list of the European Cup's most successful clubs after claiming their fifth title. Jupp Heynckes joins Ernst Happel, José Mourinho and his predecessor in Munich, Ottmar Hitzfeld, as one of four coaches to have won the European Cup with different sides. |
| 25/5/2005 | Olympiacos FC wins the National Football Championship, for the 33rd time in the club’s history, gathering 65 points with the victory against Iraklis (0-1) at Kaftanzoglio Stadium. Panathinaikos runs up second with 64p. and AEK third with 62p |
| 25/5/2005 | Liverpool is crowned European Champion, for the 5th time in the club’s history, after defeating Milan with 3-2 at the penalty shoot-out (reg. 3-3). Paolo Maldini scored the fastest ever goal (52 seconds) in a UEFA Champions League final |
| 25/5/2003 | Olympiacos win their 7th consecutive Greek League after their away win over Xanthi (5-1) |
| 25/5/2002 | Olympiacos become the first Greek water polo team to win the Champions League after defeating Honved 9-7 in the final in Budapest |
| 25/5/2002 | Manolis Diakakis, known with the nickname “Blouis” dies at the age of 68 years. He was the general manager of Panathinaikos F.C. for many years and his name was connected to the “Wembley Epic” |
| 25/5/1999 | Elizabeth Robinson Schwartz, the first female olympic winner (100m/12.2'' in 1928), dies aged 87 |
| 25/5/1997 | Maria Pangalou wins 2 silver medals at the 13th European Rhythmics Championships in Patras |
| 25/5/1997 | Aris Salonica FC drop back down to the Second Division for the first time in their history |
| 25/5/1997 | Olympiacos win their first Greek league title in 10 years |
| 25/5/1996 | Christina Sanchez becomes the first female bullfighter in Europe |
| 25/5/1996 | The German School of Athens organizes the “Old Stars” basketball tournament between different school alumni. 28-year-old Kyriakos Mitsotakis, later prime minister of Greece, plays with the team of The American College of Athens. |
| 25/5/1995 | Krezimir Cosic, one of the best all-time European basketball players, dies of cancer at the age of 48 |
| 25/5/1985 | Charlotte Motor Speedway hosts its first NASCAR race. Darrel Waltrip is the winner |
| 25/5/1984 | Velimir Zajec, player of Dinamo Zagreb and the national football team of Yugoslavia, signs with Panathinaikos, Athens |
| 25/5/1983 | First european football final held at Athens' OAKA Stadium. Hamburg win the European Champions Cup as they defeat Juventus 1-0 (Magath). Top scorer Paolo Rossi (6 goals) fails to score despite the fact he is assisted by players of great caliber (Platini, Boniek, Bettega, Scirea) |
| 25/5/1977 | Liverpool win their first European Champions Cup after beating Gladbach 3-1 in Rome |
| 25/5/1967 | Celtic become the first British football team to win the European Champions Cup after defeating Helenio Herrera's Inter by 2-1 |
| 25/5/1965 | Muhammad Ali beats Sonny Liston in round 1 in Louistone, Mane |
| 25/5/1935 | Boston Brave Babe Ruth hits the 714th and final home run of his career in a game against the Pittsburgh Pirates at Forbes Field |
| 25/5/1935 | Jesse Owens sets new world record in long jump with 8.13m |
| 25/5/1900 | 78-year-old Eyre M. Shaw becomes the oldest olympic gold winner |
| 25/5/1876 | First draw in baseball history. Athletics - Louisville 2-2 |
