Video technology remains controversial in the early stage of its debut season in the Premier League, but there is a lot of progress to be made
Former referee Keith Hackett says the Premier League has been arrogant in defence of VAR and believes the system in the English top-flight is "flawed".
VAR has been at the centre of several controversial moments in its maiden season in the Premier League, most recently during Sunday's 1-1 draw between Manchester United and Liverpool.
Despite the constant headlines the technology generates, Professional Game Match Officials Limited (PGMOL), which oversees officials across all levels of English football, says VAR made just four mistakes in the first four weeks of the campaign.