Dele Alli (L) and England coach Gareth Southgate.
"The CBF requires to know from FIFA the reason the technology was not used in key incidents during the game", their federation said in a statement.
"The performance overrides that and maybe we'll be more settled in the next game".
VAR - This is the lead assistant referee who watches not only the main live feed but a quad-view split-screen monitor underneath giving them all angles of the game.More news: China 'underestimated' Trump, a key adviser says
"But I believe the best teams in the world have that belief in what they are doing and in the end they break teams down". If there's to be anything levelled at us it would be to be ruthless with those.
VAR was called upon twice in injury time to look at disciplinary matters.
"You're always proud to see it come off in a game".
"It's a massive boost, a massive bonus, we kept going".
"And our attacking players were a threat all night".
"I will have to get myself one of those Russian dolls".More news: England fans lost their minds over Harry Kane's late game-winning goal
"There've been so many first games where England have bottled it but finally to turn it around - brilliant". But after Kyle Walker softly conceded a penalty that Ferjani Sassi converted in the 35th, numerous fouls went against England.
More would have purchased their tickets through world football's governing body Fifa but earlier in the day, fans told how they had felt outnumbered by the noisier Tunisian contingent in central Volgograd, 600 miles south of Moscow. "As with everything it needs improving and I think it will improve in time".
Hassen saved acrobatically but Kane was on hand to tap home the rebound with his right foot and open his World Cup account.
"They're really glad to have us here". He's managed to move every other barrier, so for him I am delighted.
"In a World Cup, you're never sure how it's going to go and in recent years the first games have always been hard".
"But he felt he could carry on and I thought the runs that he was making and the way he was pressing the ball was still causing a problem".More news: Britain's PM Theresa May pledges £20 billion extra for healthcare post-Brexit
The Tottenham Hotspur striker had not scored at a major tournament after drawing a blank at the last European Championship, but Southgate labeled him a "top, top striker" after his man-of-the-match display.