Spain'sIker Casillas, Italy'sGianluigi Buffon and England's David James are among those to have already condemned the lightweight Adidas ball introduced specially for the competition, which seems to deviate in the air.

Lloris, who saw the ball fly past him from Deng Zhuoxiang's 30-yard free-kick as Les Bleus went down 1-0 to China in their final warm-up friendly last Friday, is also worried.

"It's as if the wall had diverted the ball," he said of Deng's effort.

"Its variations are difficult to predict. We must be faster and vigilant in the analysis. All these factors come into account.

"This ball is amazing. It is very light. One might even say that it is designed in plastic. It is far from the good leather balls."