“Had I seen the drag curve for Jabulani prior to the 2010 World Cup in South Africa I would have been calling FIFA and Adidas saying please don’t use this ball,” Goff says. The fact that the Jabulani became unpredictable and beach-ball-like during these long passes really helped Spain win in 2010, Goff says. The Spanish team relied almost entirely on short precise passes, without long kicks that became unstable with the Jabulani ball. “That was the perfect example of a team that really fit the style of play for that ball,” Goff says.
The soccer is the world's most popular and widely watched game. Due to increasing technological advancement and demand for performance, the ball manufacturers have been developing new designs progressively. A traditional spherical football made of 32 leather panels stitched together in 1970s has become only 14 synthetic curved panels thermally bonded without stitches ball in 2006 and more recently 8 panels football in 2010. Despite being most popular game in the world, scan data is available on aerodynamic properties of footballs especially Jabulani, Teamgeist and Fevernova balls. The primary objectives of this study were to evaluate aerodynamic performances of these three soccer balls. The aerodynamic forces and moments were measured experimentally for a range of wind speeds. The aerodynamic forces and their non-dimensional coefficients were determined and compared.
However, in Goff’s wind tests, he and his team noticed that the Telstar 18 had a little more resistance at high speeds, and predict that the ball will go about eight to nine percent less distance down the pitch on long kicks. This means that Manuel Neuer, the goalkeeper for Germany who was considered to be the x-factor that brought Germany the win in 2014, might not have quite as much of an impact clearing balls from the goal this time around Goff says. “You’d see him just kicking the ball way, way down the pitch, and [this World Cup] you might notice that some of those kicks aren’t quite as long as before,” Goff says.
On the other hand, replicas (sometimes called training balls or gliders) are designed to be just like the official match balls but are much cheaper. Their panels are often stitched rather than thermally-bonded and are made of a different material. However, they’re not necessarily less durable than official match balls. So, they’re the recommended option for most players. https://www.youtube.com/watch?v=j2Xn84L3Kcs