Sport (or, in the United States, sports) is all forms of competitive physical activity which, through casual or organised participation, aim to use, maintain or improve physical fitness and provide entertainment to participants. Hundreds of sports exist, from those requiring only two participants, through to those with hundreds of simultaneous participants, either in teams or competing as individuals.

Sport is generally recognised as activities which are based in physical athleticism or physical dexterity, with the largest major competitions such as the Olympic Games admitting only sports meeting this definition, and other organisations such as the Council of Europe using definitions precluding activities without a physical element from classification as sports. However, a number of competitive, but non-physical, activities claim recognition as mind sports. The International Olympic Committee (through ARISF) recognises both chess and bridge as bona fide sports, and SportAccord, the international sports federation association, recognises five non-physical sports, although limits the amount of mind games which can be admitted as sports.

Lionel Andrés Messi (Spanish pronunciation: [ljoˈnel anˈdɾes ˈmesi], born 24 June 1987) is an Argentine footballer who plays in La Liga for FC Barcelona and is the captain of the Argentina national team, mainly as a forward.

By the age of 21, Messi had received Ballon d'Or and FIFA World Player of the Year nominations. The following year in 2009 he won both the Ballon d'Or and FIFA World Player of the Year, and won the inaugural FIFA Ballon d'Or in 2010 and 2011. He also won the 2010–11 UEFA Best Player in Europe Award. Messi is the fourth football player to win three Ballons d'Or, after Johan Cruyff, Michel Platini and Marco van Basten and the second player to win three consecutive Ballons d'Or, after Michel Platini. His playing style and small stature have drawn comparisons to Diego Maradona, who himself declared Messi as his "successor".

Messi has won five La Liga titles and three Champions League titles. In 2012, Messi made UEFA Champions League history by becoming the first player to score five goals in one match, in a 7–1 win against Bayer Leverkusen. With two goals in the next round against A.C. Milan, he matched José Altafini's record of 14 goals in a single UEFA Champions League/European Cup season. He also became the first player to top-score in four successive European Champion Clubs' Cup campaigns. He set the world record for most goals scored in a season during the 2011–12 season, with 73 goals.

Andrew Austen Luck (born September 12, 1989) is an American football quarterback for the Indianapolis Colts of the National Football League (NFL). He played college football for Stanford University, won the Maxwell Award and Walter Camp Award as college football's player of the year, and was recognized as an All-American. He was the runner-up for the Heisman Trophy in both 2010 and 2011. He was named the Offensive Player of the Year in the Pac-12 (Pac-10) Conference in both 2010 and 2011. CBS Sports draft analyst Rob Rang called Luck the best prospect he has ever scouted, while the Kansas City Star puts him in line with LeBron James and Bryce Harper as "the most hyped amateurs in recent sports memory". Although widely projected as the No. 1 selection in the 2011 NFL Draft, Luck decided to return to Stanford for his redshirt junior season.

Luck was born in Washington, D.C., the son of Oliver Luck, current athletic director and a former quarterback at West Virginia University and former NFL quarterback for the Houston Oilers, and Kathy Wilson Luck. Andrew Luck spent his early childhood in London, England and Frankfurt, Germany, where his father was general manager of two World League of American Football teams prior to becoming president of the league. He is the oldest of four children, Mary Ellen, Emily, and Addison, who currently reside in Houston. In London, he attended The American School in London.