Liverpool are one of four Premier League clubs that have been used to stage non-live tests for Hawk-eye technology, according to reports.

It is designed to detect whether a player is offside and is set to be used at the 2022 FIFA World Cup in Qatar, with an eye on being used in the Premier League from 2023.

The Times states that the company have been holding test events at Premier League grounds this season, including Liverpool, Manchester United, Manchester City and Chelsea.

The system uses cameras that track the movement of players and the ball in order to determine whether a player is offside when a pass is made.

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When first introduced, the technology will be semi-automated and send a message to the video assistant referee (VAR), who will be the one to make the final call.

With further development, the technology could become fully automated and notify the officials on the pitch as to whether or not a player is offside.

FIFA will be the ones to to approve the technology, but there is confidence it could be in use in the Premier League by the 2023/24 season.

Implementation of VAR in the Premier League has come under some criticism as Liverpool are just one of the clubs that have been on the wrong end of some incredibly tight offside calls.

This season, the assessment of marginal offsides has changed as when the lines drawn for the defender and an attacker overlap, the attacker is deemed to be onside.

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The Referees’ chief Mike Riley said in August: “Effectively what we give back to the game is 20 goals that would have been disallowed last season by using quite forensic scrutiny.

“So it’s the toenails, the noses being given offside. They might have been given offside last season, next season they won’t be.”

However, the new Hawk-eye will replace the current VAR 'lines' that are used to judge whether an attacker is offside.

The system uses 12 cameras positioned around the pitch, as well as artificial intelligence that monitors 29 points on each player's body using a 'skeletal player-tracking system.

Ball movement is also tracked and computers will be able to determine an offside call within 0.5 seconds of real time.