Juventus boss Massimiliano Allegri endorsed the introduction of VAR to the Champions League following Cristiano Ronaldo's contentious sending off against Valencia.
Ronaldo's first European appearance for his new club ended in tears as he was dismissed inside half an hour of the eventual 2-0 win at Mestalla.
The 33-year-old appeared to pull Valencia defender Jeison Murillo's hair in an off-the-ball incident and was shown a straight red by Felix Brych.
Allegri has previously been opposed to the implementation of the technology, arguing it should not be used for subjective decisions.
However, with Ronaldo set to miss next month's home meeting with Young Boys and potentially the subsequent trip to former club Manchester United, the Bianconeri boss adopted a different stance.
"I can only say that VAR would have helped the referee in this decision," Allegri told reporters.
"It is disappointing because we will lose an important player for at least a match."
1 - Cristiano Ronaldo has received his first red card in the Champions League in his 154th appearance in the competition. Off.— OptaJoe (@OptaJoe) September 19, 2018
Juve, twice finalists in the past four seasons, recovered from the loss of their star off-season signing to bank three valuable points thanks to Miralem Pjanic's twin penalties.
Allegri praised his side's composure amid a heated atmosphere.
"We were playing very well until Ronaldo's sending off but we continued to play our football despite that blow and deservedly scored two goals," he said.
"Playing here was not easy because Valencia attack with this stadium supporting them from the first to the last minute.
"I think the lads did very well, especially because they played good football when we had to do that. We all pulled together as a team when it was the moment to defend these three points."
|Halep withdraws from Kremlin Cup ahead of WTA Finals|
|Renato Sanches eager for further Bayern Munich minutes|
|Nations League standings: Promotion, relegation and race for finals|
|Windies coach Law banned for ´inappropriate comments´ in India Test|
|Carrick denies Manchester United stars are ´not trying´|
|Ferrari struggling under pressure of chasing Mercedes, says Massa|
|Australia desperately need Smith and Warner back - Warne|
|Draxler warns Germany: Mbappe has 300 hp!|
|Draymond Green says Warriors will have to ´bring it´ every night in the West|
|England´s ´wonderful bravery´ leaves Southgate excited for the future|
|Jayasuriya: I always conduct myself with integrity and transparency|
|Northern Ireland stars hurt by lack of club football, says O´Neill|
|Rodgers inspires late Packers comeback|
|Brewers blank Dodgers to take 2-1 NLCS lead|
|Cavaliers, Nance agree to four-year extension|
|Ramos wants Spain to believe in Luis Enrique´s team|
|De Laurentiis: I´ve spoken to Genoa and agent about Piatek|
|Kaka tips bright future for Paqueta after Milan agreement|
|Suns star Booker set to return for season opener|
|Warriors coach Kerr not expecting fast start from NBA champs|
|Fultz to start for 76ers as Brown eyes NBA Finals|
|Maltese champions Valletta want Usain Bolt|
|It would have been normal to kill them! Luis Enrique slams abysmal Spain|
|Seahawks, Trail Blazers owner Paul Allen dies aged 65|
|Red Sox ace Sale released from hospital, still set for game five|
|Beer-throwing fan banned by Patriots|
|Southgate lauds ´tremendous´ attackers after famous Spain win|
|Djokovic closing in on summit as he scales new heights|
|Monaco the natural move for Henry - Martinez|
|Ending England drought a ´beautiful feeling´ – Sterling|
|Halep to face Pavlyuchenkova in Moscow comeback|
|NBA 2018-19: Five non-LeBron James storylines to follow|
|Spain 2 England 3: Kane inspires Three Lions as Sterling ends drought in style|
|Bosnia-Herzegovina 2 Northern Ireland 0: Dzeko double leaves O´Neill´s side on the brink|
|Mannarino stops the rot in Moscow|
|Neymar pleased Brazil will not face Messi in Argentina clash|
|Buccaneers fire defensive coordinator Mike Smith after loss to Falcons|
|´Surprised´ Deschamps accepts he could´ve made more effort with Koscielny|
|Kuwait 0 Australia 4: Socceroos deliver win for new coach Arnold|
|Van Dijk fit for Liverpool return - Koeman|
|NBA 2018-19: Eastern Conference predictions|
|NBA 2018-19: Five rookies to watch|
|Denly replaces injured Dawson in England ODI squad|
|Low confirms under-fire Neuer to start against France|
|NBA 2018-19: Western Conference predictions|
|Bolt offered two-year deal by European club, says agent|
|NBA 2018-19: LeBron the Laker - what it means|
|Griezmann ahead of Mbappe for Ballon d´Or - Modric|
|Billy Vunipola ruled out with fractured arm|
|Get the chequebook out! - Mayweather talks up potential Khabib clash|
|Amla ruled out of Australia tour|
|Class act Hamilton more complete than ever - Wolff|
|NBA 2018-19: It´s a big season for - Ball, Kawhi, Carmelo, Love & Cousins|
|Bellew: I have no fear of Usyk|
|Birthday boy Ozil is the most creative player in Europe|
|CSA reveals De Villiers and Rabada involved in Mzansi Super League|
|FA condemns England supporters involved in trouble in Seville|
|Gascoigne hits back over Scottish Hall of Fame snub|
|NBA 2018-19: LeBron closing in on Jordan, Curry chasing Miller and Allen|
|Ter Stegen should start ahead of Neuer for Germany – Matthaus|
|England´s Sterling impressed by Sancho´s work ethic|
|Vandoorne seals switch to Formula E|
|Halep to end 2018 as world number one|
|Sri Lanka´s Jayasuriya charged by ICC with breaching anti-corruption code|
|Vermaelen out for six weeks with hamstring injury|
|LeBron and Irving did not fall out, says ex-Cavs trainer|
|Ramsey out of Wales´ clash with Republic of Ireland|
|Bolt angry with drugs test|
|Bad luck is not a coincidence – Kimmich concerned by Germany form|
|Mahomes: Chiefs need to win like Brady and the Patriots|