He should win if we go by current Manga feats. Boruto took out just as many thugs without his shadow clones as she did (4 in total, 2 without shadow clones) like Sarada did, but he didn't need to attack them in groups (EX - 2 v 1, 3 v 1, 4 v 1). So based on that, he should have better CQC than her. Since she needed to be saved after the third match.
She doesn't really have a counter to his Suiton and Raiton combination, other than jumping out of the way or moving from a clear distance. With that he could setup a VRasengan and end the match. Without the Sharingan, I don't see her countering him that well, especially since he's faster than her.