Tunisia started the match with a few attempts at goal from Mohamed Drager and a header from Youssef Msanki that went right above the cross bar in the 12th minute.
Issam Jebali had an amazing opportunity for Tunisia in the 42nd minute but goalkeeper Kasper Schmeichel blocked his attempt.
A video assistant referee (VAR) review ruled an accidental handball by Yassine Meriah. A potential penalty kick could have been a devastating blow for Tunisia and an opportunity for the Danes.
Speaking after the match, Tunisia coach Jalel Kadri said his heart sunk as the referee was called over to consult the VAR screen.
"I can’t put into words my feelings at that moment but you can imagine it well. I thought we would get that penalty given against us and the VAR has every right to intervene," Kadri said.
"But today it was in our favor and this is what football is all about. VAR decisions have to be respected," Kadri added.
Denmark had five shots on target where Tunisia's Aymen Dahmen made some acrobatic saves to keep the ball from going into the back of the net. The Carthage Eagles had one shot on target.
Tunisia is making its sixth appearance in the World Cup, having last appeared in the 2018 Russia World Cup.
The team plays Australia in their next match, and Denmark faces off against the reigning World Cup champions France on Saturday, November 26, 2022.
Some information for this report came from Reuters.