Jiànzi (毽子), ti jiànzi (踢毽子), ti jian (踢毽) or jiànqiú (毽球) is a traditional Asian game in which players aim to keep a heavily weighted shuttlecock in the air using their feet and other parts of the body (but not hands, unlike the similar games peteca and indiaca). The game, which goes by many different names (see below), may be rules-based on a court similar to badminton and Volleyball, or be played artistically, among a circle of players in a street or park, with the objective to keep the shuttle 'up' and show off skills. In Vietnam, it is known as đá cầu and is the national sport, played especially in Hanoi.

In recent years, the game has gained a formal following in Europe, the United States and elsewhere.

In English, both the sport and the object with which it is played are referred to as "shuttlecock" or "featherball". No racquets are used.

The shuttlecock, called a jianzi in the Chinese game and also known in English as a 'Chinese hacky sack' or 'kinja', typically has four feathers fixed into a rubber sole or plastic discs. Some handmade jianzis make use of a washer or a coin with a hole in the center.

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.