The aerosol can which sprays a white foam-like substance that disappears from vision quickly after use has previously been used in tournaments including the 2011 Copa America, Copa Libertadores matches and in Major League Soccer.
Use of the small can has been credited with cutting out time-consuming disputes with referees able to swiftly illustrate the place the kick should be taken from and the distance the wall needs to step back to.
(Reporting by Simon Evans, editing by Ed Osmond)
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