Southampton - The second phase of testing with Hawk-Eye's goal-line technology system has started, less than two months before football's rule-makers decide whether it can be used in games.
Experiments with the Sony Corp.- owned system were conducted at Southampton's St. Mary's Stadium on Thursday.
Hawk-Eye is a camera-based ball-tracking system successfully deployed in tennis and cricket.
The other system being considered by the International Football Association Board (IFAB) is the GoalRef system which is set to be tested in Danish matches.
GoalRef, owned by a German-Danish company, uses a magnetic field with a special ball.
IFAB is set to make a final decision on whether to allow the use of goal-line technology at a meeting on July 2.