The marathon is a long-distance running event with an official distance of 42.195 kilometres (26 miles and 385 yards), that is usually run as a road race. The event was instituted in commemoration of the fabled run of the Greek soldier Pheidippides, a messenger from the Battle of Marathon (the namesake of the race) to Athens.

The marathon was one of the original modern Olympic events in 1896, though the distance did not become standardized until 1921. More than 500 marathons are held throughout the world each year, with the vast majority of competitors being recreational athletes. Smaller marathons, such as the Stanley Marathon, can have just dozens of participants, while larger marathons can have tens of thousands of participants.

The name Marathon comes from the legend of Pheidippides, a Greek messenger. The legend states that he was sent from the battlefield of Marathon to Athens to announce that the Persians had been defeated in the Battle of Marathon (in which he had just fought), which took place in August or September, 490 BC. It is said that he ran the entire distance without stopping and burst into the assembly, exclaiming "νικωμεν’ (nikomen)", We have won), before collapsing and dying. The account of the run from Marathon to Athens first appears in Plutarch's On the Glory of Athens in the 1st century AD which quotes from Heraclides Ponticus's lost work, giving the runner's name as either Thersipus of Erchius or Eucles.Lucian of Samosata (2nd century AD) also gives the story but names the runner Philippides (not Pheidippides).

Eliud Kipchoge (born 5 November 1984 in Kapsisiywa, Nandi District) is a Kenyan long distance runner who has won medals at Olympic and World level.

He came to prominence in 2003 by winning the junior race at the IAAF World Cross Country Championships, setting a world junior record over 5000 metres on the track and then becoming world champion at the 2003 World Championships in Athletics. An Olympic 5000 m bronze for Kenya followed at the 2004 Athens Olympics and he took another bronze at the 2006 IAAF World Indoor Championships.

A series of silver medals came, starting at the 2007 World Championships in Athletics before another runner-up placing at the 2008 Summer Olympics. He was fifth at the 2009 World Championships but again reached the podium at the 2010 Commonwealth Games; he was second behind Moses Kipsiro in both the 5000 m and 10,000 metres. He has won four medals at editions of the annual IAAF World Athletics Final and is a five-time 5000 m finalist at the World Championships.

His 3000 metres best of 7:27.72 ranks him among the top ten at the distance and his 5000 m best of 12:46.53 makes him the fourth fastest ever in the event.

Serena Jameka Williams (born September 26, 1981) is an American professional tennis player and a former world no. 1. The Women's Tennis Association has ranked her world no. 1 in singles on five separate occasions. She became the world no. 1 for the first time on July 8, 2002 and regained this ranking for the fifth time on November 2, 2009. She is the only female player to have won over $35 million in prize money.

Her 27 Grand Slam titles places her ninth on the all-time list: 13 in singles, 12 in women's doubles, and 2 in mixed doubles. She is the most recent player, male or female, to have held all four Grand Slam singles titles simultaneously and only the fifth woman in history to do so. She was also the first woman, along with sister Venus Williams, to hold all four Grand Slam doubles titles simultaneously since Martina Hingis did so in 1998. Her 13 Grand Slam singles titles is sixth on the all-time list. Williams ranks fourth in Grand Slam women's singles titles won during the open era, behind Steffi Graf (22 titles) and Chris Evert and Martina Navratilova (18 titles each). She has won more Major titles in singles, doubles, and mixed doubles than any other active player, male or female.