South Africa competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's sixteenth overall and fourth consecutive appearance at the Summer Olympics in the post-apartheid era. The South African Sports Confederation and Olympic Committee (SASCOC) sent a total of 106 athletes to the Games, 66 men and 40 women, to compete in 19 sports. Field hockey was the only team-based sport in which South Africa had its representation at these Games. There was only a single competitor in archery, canoeing, diving, artistic and rhythmic gymnastics, judo, sailing, shooting, taekwondo, and wrestling.
Portugal competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. Portuguese athletes have competed at every Summer Olympic Games in the modern era since 1912. The Olympic Committee of Portugal sent the nation's second-largest team to the Games. A total of 81 athletes, 64 men and 17 women, were selected by the committee to participate in 15 sports. Men's football was the only team-based sport in which Portugal had its representation at these Games. There was only a single competitor in badminton, canoeing, equestrian, artistic and trampoline gymnastics, triathlon, and wrestling, which made its official Olympic comeback after an eight-year absence.
Malta competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's thirteenth appearance at the Olympics since its debut in 1928.
Cyprus competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004.
Bahrain competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004.
The men's 4 × 100 metre relay event at the 2008 Olympic Games took place on 21 and 22 August at the Beijing National Stadium.
The women's 4 × 100 metres relay event at the 2008 Olympic Games took place on 21 and 22 August at the Beijing Olympic Stadium.
The men's 4 × 100 metres relay at the 2009 World Championships in Athletics took place at the Olympic Stadium in Berlin on August 21 and August 22. The two main contenders for the event were the reigning World Champions, the United States, and the reigning Olympic Champions, Jamaica. Jamaica held the world record at 37.10, which was established at the 2008 Summer Olympics in Beijing, while the United States entered with the 2009 overall season-best 37.85.
The men's 4 × 400 metres relay event at the 1928 Olympic Games took place between August 4 and August 5.
The women's 4 × 100 metres relay event at the 1928 Olympic Games took place between August 4 & August 5.
The men's 4 × 100 metres relay event at the 1936 Olympic Games took place on August 9. The United States team of Jesse Owens, Ralph Metcalfe, Foy Draper and Frank Wykoff won in a world record time of 39.8.
The women's 4 × 100 metres relay event at the 1936 Olympic Games took place on August 8 and August 9. The American team won with a time of 46.9 s after the German team, which had been in the lead, dropped the baton on the final leg.
The men's 4 × 200 metre freestyle relay event at the 2010 Asian Games took place on 15 November 2010 at Guangzhou Aoti Aquatics Centre.
The men's 4 × 100 metre medley relay event at the 2010 Asian Games took place on 18 November 2010 at Guangzhou Aoti Aquatics Centre.
The men's 4 × 100 metres relay event at the 2010 Asian Games was held at the Aoti Main Stadium, Guangzhou, China on 23–26 November.
The men's 4 × 400 metres relay event at the 2010 Asian Games was held at the Aoti Main Stadium, Guangzhou, China on 23–26 November.
The men's 4 × 100 metres relay event at the 2003 Pan American Games was held on August 8–9. The original winners, the United States, were later disqualified after one of their members, Mickey Grimes, was found guilty of ephedrine doping.
The men's 4 × 100 metres relay event at the 2014 Asian Games was held at the Incheon Asiad Main Stadium, Incheon, South Korea on 29 September – 2 October.
The men's 4 × 100 metre freestyle relay event at the 2018 Asian Games took place on 22 August at the Gelora Bung Karno Aquatic Stadium.
The men's 4 × 100 metres relay competition at the 2018 Asian Games took place on 29 and 30 August 2018 at the Gelora Bung Karno Stadium.
