There is one massive deciding factor in this first-round series: the health of Luka Doncic. He is currently battling a calf strain; if he is not full strength or misses games, that will give the Jazz the advantage. It appears that unless Doncic reaggravates the injury, he should play.
On the other side of the matchup, the Jazz are, simply put, a solid team. Not a bad one but not a great one either. The tandem of Rudy Gobert and Donovan Mitchell, who are both all-stars, is solid. Yet the Jazz have proved that the duo is not a championship one time and time again.
Prediction: Mavericks
The Mavericks are the better defensive team overall, and as long as Doncic is good to go, they are just the better team. Expect many close games, but Doncic has proven he can close out games and get the win coming down the stretch.