The Bhoys narrowly beat Kilmarnock 1-0 on Saturday.
The Hoops and Scottish Premiership leaders looked on course for a demoralising result at Rugby Park, before the Australian midfielder let fly from the guts of 25 yards to dramatically snatch all three points.
It lifted Ronny Deila's men - who also have a game in hand - four points clear of second-placed Aberdeen in what perhaps should have been a one-horse title race from the very start.
Nevertheless, Sviatchenko is delighted with Rogic's "unbelievable" strike and the importance of it for the title race is not lost on the big Danish defender.
“The goal was unbelievable. I was right behind Tom and saw him turn onto his left foot and hit it. I just thought: ‘Yes, it’s going in’. It was such a good strike," he is quoted as saying by the Glasgow Evening Times.
“I know it is a really, really important three points. At this stage, with not so many games left in the season, every game really counts. To score a late winner like this can be really, really important.
“It is always important to win and if we want to be champions, we have to cope with that pressure all the time.”
The Bhoys appear to be edging their way to a fifth successive Premiership title, with the Dons losing later on Saturday to miss the chance to close the gap to one point again.
Nevertheless, such a close-fought scrap does not inspire confidence and Deila might well find it hard to keep his job at Parkhead beyond this summer, regardless of whether they win the league or not.