Horlle began his collegiate career in triumphant fashion. The Robert Morris rookie accounted for both singles and doubles victories in the Colonials’ 5-2 season-opening team win over Mercyhurst. Horlle paired with sophomore Tarun Kishan to post an 8-5 victory at No. 2 doubles. Later in the day, Horlle won his singles match in straight sets at the No. 4 position. After winning a first-set tiebreaker by a 9-7 count, he cruised to a 6-1 win in the second set.