Fevernova (Japan/Korea 2002) | Adidas gave the Fevernova an Asia-inspired look while also incorporating some high-performance interior material into it. Syntactic foam was used to decrease the weight of the Fevernova. However, many critics felt the ball was too light with some goalkeepers even blaming it for the goals they conceded in the tournament. Teamgeist (Germany 2006) | The Teamgeist was created using the revolutionary 14-panel design with the seams heat-sealed rather than sewn. The ball marked the end of multiple ridges and seams with the aim of improving player accuracy. The Teamgeist also featured the colours of the German national flag as well as the golden colour of the World Cup trophy. Jabulani (South Africa 2010) | This ball is often remembered as one of the most hated balls of all time. The Jabulani was made using just eight panels and incorporated a patterned surface that was meant to improve its aerodynamics. The ball came in for a lot of criticism from the players because of its unpredictable flight which caused keepers numerous problems throughout the tournament. Brazuca (Brazil 2014) | Facing flak for the Jabulani, Adidas came out with the most-tested ball ever which was released following public voting in the host nation. The Brazuca was made using only six panels and was decorated with swooping patterns which gave it a completely unique look. This ball exceeded FIFA standards after undergoing extensive lab tests and was also well received by the players. Telstar 18 (Russia 2018) | The Telstar 18 is reimagined and named after the first Adidas World Cup match ball used in Mexico in 1970. Sporting the simple black and white colour of the very first Telstar, Adidas have maintained the same structural framework of the Brazuca for the Telstar 18. However, the Telstar 18 features an embedded NFC chip, which enables users to interact with the ball using a smartphone.