Football's governing body FIFA has had two different systems tested at a Germany stadium as they look to introduce goal line technology into top-flight football.
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Both 'Goal-Ref', a system which can verify whether a goal has been scored by using a chip in the ball, and 'Hawk-Eye', the camera system already used in tennis, were tested at the Duesseldorf Arena on Tuesday.
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A number of factors were included to create realistic factors which could affect the system, with teasers using smoke machines and strobe lighting to replicate different weather conditions.
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'' The goal-line technology will be tested for performance and reliability. There will be static and dynamic tests to stimulate day and night situations '' said FIFA in a statement.
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The new technology could be used in the Bnundesliga as early as the start of the 2013/14 season in August.