Football Federation Australia has announced it will introduce two extra officials for the rest of the FFA Cup, a trial that could see the system ultimately implemented in the A-League.

In addition to the main referee, two linesmen and the fourth official, two assistants will stand alongside each goal for the remaining 15 matches of the competition, which has reached the round-of-16 phase.

Infamous: Manchester United's Roy Carroll drops the ball into his goal in 2005, but it was ruled no goal. Credit:Channel Nine News

The system has already been trialled in the Europa League for five years and has generally been considered a success, with UEFA since expanding it across their club and international competitions.

The advent of goal-line technology – used in the recent World Cup in Brazil, in the English Premier League and Major League Soccer – has also challenged the need for extra officials.