European soccer's governing body has so far resisted implementation of the VAR system, which allows key incidents to be reviewed with the use of video replays and was used at the World Cup in Russia this year.
Apex football body FIFA and the International Football Association Board (IFAB), which set the rules, have issued new guidelines ahead of the restart of the Bundesliga.
The sight of Tunisia defenders wrestling England's Harry Kane to the ground in the penalty area without punishment during Monday's World Cup Group G match has raised more questions about the worth of the Video Assistant Referee (VAR).
A round-up of Saturday's action in LaLiga, Ligue 1, Serie A and Bundesliga.
Some reporters later returned to the conference room, although local press strongly condemned the player's actions, adding to criticism of the team's poor form this season, which has left them sitting 10th in the Liga MX table.
The Video Assistant Referee (VAR) was used for the first time in a World Cup final to award France a 38th-minute penalty which Antoine Griezmann scored to give them a 2-1 lead over Croatia.
Manchester City had a late goal from Gabriel Jesus ruled out by VAR video review as they drew 2-2 at home to Tottenham Hotspur on Saturday -- their first league home game without victory in nearly eight months.
Juventus substitute Cristiano Ronaldo was denied a stoppage-time winner by VAR as Udinese came from two goals down to snatch a 2-2 draw in their thrilling Serie A season opener on Sunday.
Carlo Ancelotti's side were then reduced to 10 men in the 79th minute when Vinicius Jr was shown a straight red card for slapping Valencia goalkeeper Stole Dimitrievski.
Poland striker Robert Lewandowski scored from his second attempt from the penalty spot against France.
Barcelona thrashed Real Betis 5-1 on Wednesday to book their spot in the Copa del Rey quarter-finals.
Amad Diallo struck a late equaliser as Manchester United made a mockery of their recent form to hold Premier League leaders Liverpool
Julen Lopetegui's side were awarded a penalty early in the game after a VAR review determined forward Nolito had been fouled by Valladolid's Javi Moyano as he shaped to shoot, even though his team mates had barely appealed for a foul.
Wolverhampton Wanderers had a goal controversially ruled out by VAR as they were held to a 0-0 draw at home to Leicester City, who finished with 10 men, in the Premier League on Friday.
Manchester City defender John Stones headed a controversial stoppage-time winner in a 2-1 victory at Wolverhampton Wanderers on Sunday that took them top of the Premier League and set a club record of 31 league games unbeaten.
The following factbox details five times a Video Assistant Referee (VAR) made an impact at the World Cup.
Images from the Serie A and La Liga matches played on Saturday.
A summary of Sunday's action in the Premier League.
Lucas Bergvall scored his first goal for Tottenham Hotspur to give his side a surprise 1-0 victory over holders Liverpool in the first leg of their League Cup semi-final on Wednesday.
Lewandowski strike gives Barcelona 1-0 win over Alaves
A round-up of Wednesday's UEFA Champions League last-16 first leg matches.
A summary of Saturday's action in the Serie A, Ligue 1 and Bundesliga
IMAGES from the Premier League matches played on Sunday
IMAGES from the English Premier League match played between Arsenal and Chelsea at Emirates Stadium in London on Sunday.
A summary of Tuesday's Champions League Round of 16, Second Leg, matches.
A deflected late strike from Lisandro Martinez earned Manchester United a much-needed 1-0 victory at Fulham in the Premier League on Sunday.
A summary of Wednesday's action in the UEFA Champions League Knock-out phase play-offs.
European soccer's governing body opted against using VAR this season, despite the technology being employed by major European leagues in Spain, Italy and Germany, and the World Cup in Russia this year.
A round-up of Saturday's action in LaLiga, Ligue 1 and Serie A
Manchester City forward Gabriel Jesus became the first player to have a goal disallowed by the Video Assistant Referee (VAR) in the English Premier League.
'People sitting in the stands need to know what the rules are. Who is refereeing the game? We need to know. People deserve to know what are the rules of the game and the game belongs to the people.'
LaLiga leaders Barcelona beat Espanyol 3-1 in the Catalan derby on Sunday thanks to a first-half double from Dani Olmo and a goal from Raphinha.
Tottenham Hotspur gained a slender advantage in their League Cup semi-final against London rivals Chelsea as Harry Kane's penalty earned them a gritty 1-0 first-leg win.
Barcelona's Raphinha scored deep into stoppage time to hand his side a dramatic 5-4 comeback win at Benfica and a place in the Champions League last 16.
Fiorentina said in a statement that Edoardo Bove was under sedation at the Careggi University Hospital in Florence having lost consciousness during the match.
Young becomes oldest Everton scorer in rout of Wolves
News of all that's transpired on and off the football field
'I haven't heard any serious proposals regarding the protection of the referees'
Llorente's second-half treble, a double from Son Heung-min and a late effort from Kyle Walker-Peters in driving snow at a freezing Wembley Stadium settled an game where tensions had threatened to bubble over before the break.
Manchester United languish 14th in the standings on 19 points, their worst placing to end a calendar year since they were 15th in 1989.