World Cup 2010: Fabio Capello slams 'worst ever ball'
Highlights - England 1-1 USA
England coach Fabio Capello believes the World Cup ball is the worst he has ever seen.
The Jabulani ball being used in South Africa for the World Cup has been widely criticised because of its irregular flight.
"For the players it is terrible," said Capello. "It is also terrible for the keepers because it is impossible to anticipate the trajectory."
World governing body Fifa has defended the ball, saying it was fully "tested".
The Jabulani - its name derives from the Zulu words "to celebrate" - was made available in February and was used at this year's Africa Cup of Nations as well as a number of domestic leagues, including Germany, Argentina and the United States.
The ball was tested at Loughborough University in England but it was not used in the Premier League because it has a contract with rival manufacturer Nike.
Adidas say altitude is the main factor affecting the way the ball behaves in flight and have blamed players for not practising enough with it before the tournament.
However, Capello feels the ball is having an adverse effect on games.
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