The Terps allowed a season-high two goals after giving up one goal combined in their first three contests.
The No. 20 Terps missed a penalty kick after conceding one of their own as they dropped their first game against the Cavaliers since 2019.
Copetti's 72nd minute penalty was saved as the Terps were shut out for the second time this season.
Copetti transferred from a smaller program to Maryland last season, but he's already stepping into a leadership role for the Terps.
The Terps' coach has been experimenting with different combinations of attackers.
Kimani Stewart-Baynes notched his first collegiate goal and assist as the Terps recorded their first win of 2023.
The Terps didn’t score on any of their seven corners and mustered just two shots in the dreary opener.
The Terps are ranked No. 14 in the preseason coaches poll and were picked to win the Big Ten in the conference’s preseason poll.