The +Teamgeist (German pronunciation: [ˈtiːmgaɪ̯st]) was the official match ball for the 2006 FIFA World Cup in Germany. The plus sign in its name was introduced for trademark purposes, since the regular German word Teamgeist, meaning "team spirit", could not be trademarked.
The ball was designed by the Adidas Innovation Team and the Molten Corporation and is made by Adidas, which has provided the balls used in all World Cup matches since the 1970 World Cup when the Telstar was introduced. The +Teamgeist ball differs from previous balls in having just 14 curved panels (making the ball topologically equivalent to a truncated octahedron), rather than the 32 that have been standard since 1970. Like the 32 panel Roteiro which preceded it, the +TeamGeist panels are bonded together, rather than stitched. It is claimed to be rounder and to perform more uniformly regardless of where it is hit, and being almost waterproof, it does not get heavier in wet weather.
World Cup match balls
Each of the 32 qualified federations received 40 match balls for training purposes.
Match balls for the 2006 FIFA World Cup were personalized with the name of the stadium, the teams, the match date, and the kick-off time of each individual game, under a protective coating.
A special match ball was used for the final game — the "+Teamgeist Berlin". The design is the same as the other match balls, but accented in gold, with black and white details. Both qualified federations (France and Italy) received 20 of these versions for training purposes.There is also a gold +Teamgeist ball.
|FIFA Approved standard||Teamgeist measurements|
|Circumference||68.5 – 69.5 cm||69.0 – 69.25 cm|
|Diameter||≤ 1.5% difference||≤ 1.0% difference|
|Water absorption||≤ 10% weight increase||≤ 0.1% weight increase|
|Weight||420 - 445 g||441 - 444 g|
|Shape and size retention||2000 cycles at 50 km·h−1||3500 cycles at 50 km·h−1|
|Rebound test||≤ 10 cm||≤ 2 cm|
|Loss of pressure||≤ 20%||≤ 11%|
The Teamgeist was the first World Cup ball to not have the traditional 32 panels. Instead, the ball is made up of 14 panels, which means that the number of three-panel touch points is reduced by 60% (60 to 24) and the total length of the panel lines falls by over 15% (400.5 cm to 339.3 cm). Building on the introduction of thermal bonding technology in 2004, the Teamgeist ball is the first time Adidas has used this in a World Cup. Loughborough University conducted extensive comparative testing on the ball, along with the Adidas football laboratory in Scheinfeld, Germany.
While Swiss international Johann Vogel and David Beckham, both sponsored by Adidas, and others were reported to be happy with the new ball, it was criticized by many top players before the World Cup. Players such as Brazil's Roberto Carlos and Paul Robinson of England were among the critics of the new ball, claiming it was too light and had a vastly different performance when wet. However, most people are unanimous in thinking this the best ball ever. The ball has fewer seams, reducing air resistance and thus altering flight patterns.
The Teamgeist 2 was introduced by Adidas as an update of the ball during the 2007 Club World Cup in Japan. The ball was then formally introduced in 2008.
Adidas has produced multiple variants of the +Teamgeist and Teamgeist 2 for various competitions. 
|2006||Teamgeist||2006 FIFA World Cup|
|2006||Teamgeist Berlin||2006 FIFA World Cup final|
|Teamgeist Red||2006 FIFA Club World Cup|
|2006||Teamgeist RFEF||2006–07 Copa del Rey|
|2007||Teamgeist Blue 2007 China||2007 FIFA Women’s World Cup|
|2007||Teamgeist Red 2007 Canada||2007 FIFA Under-20 World Cup|
- "Official World Cup Final Match Ball Teamgeist Soccer Ball". Soccerballworld.com. 2006-04-18. Archived from the original on 15 July 2010. Retrieved 2010-07-13.
- "adidas unveils the match ball for the 2006 FIFA World Cup - tested at Loughborough University". Loughborough University. 13 December 2005. Retrieved 28 September 2008.
- "Champs: New ball falls flat". Sports. St. Petersburg Times. Associated Press. 2006-06-02. Retrieved 2010-07-13.
- Taylor, Daniel (7 June 2006). "The balls are awful says Robinson, but luckily I've had some practice". World Cup 2006. Baden-Baden: Guardian Unlimited Football. Retrieved 2010-07-13.
- Elliot, Danielle. "Why the World Cup Suddenly Has So Many Goals". Nautilus. Retrieved 7 August 2014.
- "Hosni Abd Rabou Exclusive". MTN Africa Cup of Nations. 2008-02-06. Archived from the original on 2011-02-03. Retrieved 28 September 2008.
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| FIFA World Cup official ball